* [bug report] mmc: starfive: Add sdio/emmc driver support
@ 2023-02-27 7:06 Dan Carpenter
2023-02-27 7:26 ` William Qiu
0 siblings, 1 reply; 4+ messages in thread
From: Dan Carpenter @ 2023-02-27 7:06 UTC (permalink / raw)
To: william.qiu; +Cc: linux-mmc
Hello William Qiu,
The patch 9e622229bbf4: "mmc: starfive: Add sdio/emmc driver support"
from Feb 15, 2023, leads to the following Smatch static checker
warning:
drivers/mmc/host/dw_mmc-starfive.c:77 dw_mci_starfive_execute_tuning()
error: uninitialized symbol 'prev_err'.
drivers/mmc/host/dw_mmc-starfive.c
47 static int dw_mci_starfive_execute_tuning(struct dw_mci_slot *slot,
48 u32 opcode)
49 {
50 static const int grade = MAX_DELAY_CHAIN;
51 struct dw_mci *host = slot->host;
52 struct starfive_priv *priv = host->priv;
53 int rise_point = -1, fall_point = -1;
54 int err, prev_err;
55 int i;
56 bool found = 0;
57 u32 regval;
58
59 /*
60 * Use grade as the max delay chain, and use the rise_point and
61 * fall_point to ensure the best sampling point of a data input
62 * signals.
63 */
64 for (i = 0; i < grade; i++) {
65 regval = i << priv->syscon_shift;
66 err = regmap_update_bits(priv->reg_syscon, priv->syscon_offset,
67 priv->syscon_mask, regval);
68 if (err)
69 return err;
70 mci_writel(host, RINTSTS, ALL_INT_CLR);
71
72 err = mmc_send_tuning(slot->mmc, opcode, NULL);
73 if (!err)
74 found = 1;
75
76 if (i > 0) {
--> 77 if (err && !prev_err)
prev_err was never initialized to zero.
78 fall_point = i - 1;
79 if (!err && prev_err)
80 rise_point = i;
81 }
82
83 if (rise_point != -1 && fall_point != -1)
84 goto tuning_out;
85
86 prev_err = err;
87 err = 0;
88 }
89
regards,
dan carpenter
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [bug report] mmc: starfive: Add sdio/emmc driver support
2023-02-27 7:06 [bug report] mmc: starfive: Add sdio/emmc driver support Dan Carpenter
@ 2023-02-27 7:26 ` William Qiu
2023-02-27 7:29 ` Dan Carpenter
0 siblings, 1 reply; 4+ messages in thread
From: William Qiu @ 2023-02-27 7:26 UTC (permalink / raw)
To: Dan Carpenter; +Cc: linux-mmc
On 2023/2/27 15:06, Dan Carpenter wrote:
> Hello William Qiu,
>
> The patch 9e622229bbf4: "mmc: starfive: Add sdio/emmc driver support"
> from Feb 15, 2023, leads to the following Smatch static checker
> warning:
>
> drivers/mmc/host/dw_mmc-starfive.c:77 dw_mci_starfive_execute_tuning()
> error: uninitialized symbol 'prev_err'.
>
> drivers/mmc/host/dw_mmc-starfive.c
> 47 static int dw_mci_starfive_execute_tuning(struct dw_mci_slot *slot,
> 48 u32 opcode)
> 49 {
> 50 static const int grade = MAX_DELAY_CHAIN;
> 51 struct dw_mci *host = slot->host;
> 52 struct starfive_priv *priv = host->priv;
> 53 int rise_point = -1, fall_point = -1;
> 54 int err, prev_err;
> 55 int i;
> 56 bool found = 0;
> 57 u32 regval;
> 58
> 59 /*
> 60 * Use grade as the max delay chain, and use the rise_point and
> 61 * fall_point to ensure the best sampling point of a data input
> 62 * signals.
> 63 */
> 64 for (i = 0; i < grade; i++) {
> 65 regval = i << priv->syscon_shift;
> 66 err = regmap_update_bits(priv->reg_syscon, priv->syscon_offset,
> 67 priv->syscon_mask, regval);
> 68 if (err)
> 69 return err;
> 70 mci_writel(host, RINTSTS, ALL_INT_CLR);
> 71
> 72 err = mmc_send_tuning(slot->mmc, opcode, NULL);
> 73 if (!err)
> 74 found = 1;
> 75
> 76 if (i > 0) {
> --> 77 if (err && !prev_err)
>
> prev_err was never initialized to zero.
>
Hi Carpenter,
I will fixed it. But what should I do next，send a new version to fixed
it or send a patch to you?
Best regards
William
> 78 fall_point = i - 1;
> 79 if (!err && prev_err)
> 80 rise_point = i;
> 81 }
> 82
> 83 if (rise_point != -1 && fall_point != -1)
> 84 goto tuning_out;
> 85
> 86 prev_err = err;
> 87 err = 0;
> 88 }
> 89
>
> regards,
> dan carpenter
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [bug report] mmc: starfive: Add sdio/emmc driver support
2023-02-27 7:26 ` William Qiu
@ 2023-02-27 7:29 ` Dan Carpenter
2023-02-27 7:37 ` William Qiu
0 siblings, 1 reply; 4+ messages in thread
From: Dan Carpenter @ 2023-02-27 7:29 UTC (permalink / raw)
To: William Qiu; +Cc: linux-mmc
On Mon, Feb 27, 2023 at 03:26:58PM +0800, William Qiu wrote:
>
>
> On 2023/2/27 15:06, Dan Carpenter wrote:
> > Hello William Qiu,
> >
> > The patch 9e622229bbf4: "mmc: starfive: Add sdio/emmc driver support"
> > from Feb 15, 2023, leads to the following Smatch static checker
> > warning:
> >
> > drivers/mmc/host/dw_mmc-starfive.c:77 dw_mci_starfive_execute_tuning()
> > error: uninitialized symbol 'prev_err'.
> >
> > drivers/mmc/host/dw_mmc-starfive.c
> > 47 static int dw_mci_starfive_execute_tuning(struct dw_mci_slot *slot,
> > 48 u32 opcode)
> > 49 {
> > 50 static const int grade = MAX_DELAY_CHAIN;
> > 51 struct dw_mci *host = slot->host;
> > 52 struct starfive_priv *priv = host->priv;
> > 53 int rise_point = -1, fall_point = -1;
> > 54 int err, prev_err;
> > 55 int i;
> > 56 bool found = 0;
> > 57 u32 regval;
> > 58
> > 59 /*
> > 60 * Use grade as the max delay chain, and use the rise_point and
> > 61 * fall_point to ensure the best sampling point of a data input
> > 62 * signals.
> > 63 */
> > 64 for (i = 0; i < grade; i++) {
> > 65 regval = i << priv->syscon_shift;
> > 66 err = regmap_update_bits(priv->reg_syscon, priv->syscon_offset,
> > 67 priv->syscon_mask, regval);
> > 68 if (err)
> > 69 return err;
> > 70 mci_writel(host, RINTSTS, ALL_INT_CLR);
> > 71
> > 72 err = mmc_send_tuning(slot->mmc, opcode, NULL);
> > 73 if (!err)
> > 74 found = 1;
> > 75
> > 76 if (i > 0) {
> > --> 77 if (err && !prev_err)
> >
> > prev_err was never initialized to zero.
> >
> Hi Carpenter,
>
> I will fixed it. But what should I do next，send a new version to fixed
> it or send a patch to you?
Heh?! No, leave me out of it. Just send a patch with a Fixes tag to
the linux-mmc@vger.kernel.org and the maintainers and so on. Please
give me a Reported-by: Dan Carpenter <error27@gmail.com> credit though.
regards,
dan carpenter
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [bug report] mmc: starfive: Add sdio/emmc driver support
2023-02-27 7:29 ` Dan Carpenter
@ 2023-02-27 7:37 ` William Qiu
0 siblings, 0 replies; 4+ messages in thread
From: William Qiu @ 2023-02-27 7:37 UTC (permalink / raw)
To: Dan Carpenter; +Cc: linux-mmc
On 2023/2/27 15:29, Dan Carpenter wrote:
> On Mon, Feb 27, 2023 at 03:26:58PM +0800, William Qiu wrote:
>>
>>
>> On 2023/2/27 15:06, Dan Carpenter wrote:
>> > Hello William Qiu,
>> >
>> > The patch 9e622229bbf4: "mmc: starfive: Add sdio/emmc driver support"
>> > from Feb 15, 2023, leads to the following Smatch static checker
>> > warning:
>> >
>> > drivers/mmc/host/dw_mmc-starfive.c:77 dw_mci_starfive_execute_tuning()
>> > error: uninitialized symbol 'prev_err'.
>> >
>> > drivers/mmc/host/dw_mmc-starfive.c
>> > 47 static int dw_mci_starfive_execute_tuning(struct dw_mci_slot *slot,
>> > 48 u32 opcode)
>> > 49 {
>> > 50 static const int grade = MAX_DELAY_CHAIN;
>> > 51 struct dw_mci *host = slot->host;
>> > 52 struct starfive_priv *priv = host->priv;
>> > 53 int rise_point = -1, fall_point = -1;
>> > 54 int err, prev_err;
>> > 55 int i;
>> > 56 bool found = 0;
>> > 57 u32 regval;
>> > 58
>> > 59 /*
>> > 60 * Use grade as the max delay chain, and use the rise_point and
>> > 61 * fall_point to ensure the best sampling point of a data input
>> > 62 * signals.
>> > 63 */
>> > 64 for (i = 0; i < grade; i++) {
>> > 65 regval = i << priv->syscon_shift;
>> > 66 err = regmap_update_bits(priv->reg_syscon, priv->syscon_offset,
>> > 67 priv->syscon_mask, regval);
>> > 68 if (err)
>> > 69 return err;
>> > 70 mci_writel(host, RINTSTS, ALL_INT_CLR);
>> > 71
>> > 72 err = mmc_send_tuning(slot->mmc, opcode, NULL);
>> > 73 if (!err)
>> > 74 found = 1;
>> > 75
>> > 76 if (i > 0) {
>> > --> 77 if (err && !prev_err)
>> >
>> > prev_err was never initialized to zero.
>> >
>> Hi Carpenter,
>>
>> I will fixed it. But what should I do next，send a new version to fixed
>> it or send a patch to you?
>
> Heh?! No, leave me out of it. Just send a patch with a Fixes tag to
> the linux-mmc@vger.kernel.org and the maintainers and so on. Please
> give me a Reported-by: Dan Carpenter <error27@gmail.com> credit though.
>
> regards,
> dan carpenter
>
Fine, I'll do it then. Thanks anyway.
Best regards
William
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-02-27 7:38 UTC | newest]
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2023-02-27 7:06 [bug report] mmc: starfive: Add sdio/emmc driver support Dan Carpenter
2023-02-27 7:26 ` William Qiu
2023-02-27 7:29 ` Dan Carpenter
2023-02-27 7:37 ` William Qiu
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