[patch] ALSA: hda/ca0132 - fix error handling for dsp_chip_to_dsp_addx()

[patch] ALSA: hda/ca0132 - fix error handling for dsp_chip_to_dsp_addx()

[Dan Carpenter]

The error handling here won't work on 64 bit systems.
INVALID_CHIP_ADDRESS is an unsigned long defined like this:

#define INVALID_CHIP_ADDRESS        (~0UL)

But we truncate the high bits away before returning and then we save it
in an unsigned 32bit and then we compare it against the unsigned long
version.

I've changed everything to unsigned long.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c
index 639a282..42114e9 100644
--- a/sound/pci/hda/patch_ca0132.c
+++ b/sound/pci/hda/patch_ca0132.c
@@ -1581,7 +1581,7 @@ static int dsp_reset(struct hda_codec *codec)
 /*
  * Convert chip address to DSP address
  */
-static unsigned int dsp_chip_to_dsp_addx(unsigned int chip_addx,
+static unsigned long dsp_chip_to_dsp_addx(unsigned int chip_addx,
 					bool *code, bool *yram)
 {
 	*code = *yram = false;
@@ -1596,7 +1596,7 @@ static unsigned int dsp_chip_to_dsp_addx(unsigned int chip_addx,
 		return Y_OFF(chip_addx);
 	}
 
-	return (unsigned int)INVALID_CHIP_ADDRESS;
+	return INVALID_CHIP_ADDRESS;
 }
 
 /*
@@ -1620,7 +1620,7 @@ static int dsp_dma_setup_common(struct hda_codec *codec,
 {
 	int status = 0;
 	unsigned int chnl_prop;
-	unsigned int dsp_addx;
+	unsigned long dsp_addx;
 	unsigned int active;
 	bool code, yram;
 
@@ -1712,7 +1712,7 @@ static int dsp_dma_setup_common(struct hda_codec *codec,
 	snd_printdd(KERN_INFO "   dsp_dma_setup_common()    Write IRQCNT");
 
 	snd_printdd(
-		   "ChipA=0x%x,DspA=0x%x,dmaCh=%u, "
+		   "ChipA=0x%x,DspA=0x%lx,dmaCh=%u, "
 		   "CHSEL=0x%x,CHPROP=0x%x,Active=0x%x\n",
 		   chip_addx, dsp_addx, dma_chan,
 		   port_map_mask, chnl_prop, active);
@@ -1732,7 +1732,7 @@ static int dsp_dma_setup(struct hda_codec *codec,
 {
 	int status = 0;
 	bool code, yram;
-	unsigned int dsp_addx;
+	unsigned long dsp_addx;
 	unsigned int addr_field;
 	unsigned int incr_field;
 	unsigned int base_cnt;

Re: [patch] ALSA: hda/ca0132 - fix error handling for dsp_chip_to_dsp_addx()

[Takashi Iwai]

At Mon, 11 Feb 2013 22:05:24 +0300,
Dan Carpenter wrote:
> 
> The error handling here won't work on 64 bit systems.
> INVALID_CHIP_ADDRESS is an unsigned long defined like this:
> 
> #define INVALID_CHIP_ADDRESS        (~0UL)
> 
> But we truncate the high bits away before returning and then we save it
> in an unsigned 32bit and then we compare it against the unsigned long
> version.
> 
> I've changed everything to unsigned long.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

Thanks for finding this.
Actually the DSP address field seems 32bit long, so it's simply a
wrong define for INVALID_CHIP_ADDRESS to use unsigned long.
I fixed the definition instead in the patch below.


Takashi

---
From: Takashi Iwai <tiwai@suse.de>
Subject: [PATCH] ALSA: hda/ca0132 - Fix type of INVALID_CHIP_ADDRESS

The chip address is 32bit long but INVALID_CHIP_ADDRESS is defined as
an unsigned long.  This makes dsp_chip_to_dsp_addx() misbehaving on
64bit architectures.  Fix the INVALID_CHIP_ADDRESS definition to be
32bit.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/ca0132_regs.h  | 2 +-
 sound/pci/hda/patch_ca0132.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/ca0132_regs.h b/sound/pci/hda/ca0132_regs.h
index 831ca9c..07e7609 100644
--- a/sound/pci/hda/ca0132_regs.h
+++ b/sound/pci/hda/ca0132_regs.h
@@ -337,7 +337,7 @@
 #define DSPDMAC_ACTIVE_WFR_MASK        0xFFF000
 
 #define DSP_AUX_MEM_BASE            0xE000
-#define INVALID_CHIP_ADDRESS        (~0UL)
+#define INVALID_CHIP_ADDRESS        (~0U)
 
 #define X_SIZE  (XRAM_XRAM_CHANNEL_COUNT   * XRAM_XRAM_CHAN_INCR)
 #define Y_SIZE  (YRAM_YRAM_CHANNEL_COUNT   * YRAM_YRAM_CHAN_INCR)
diff --git a/sound/pci/hda/patch_ca0132.c b/sound/pci/hda/patch_ca0132.c
index b1e099a..fe07664 100644
--- a/sound/pci/hda/patch_ca0132.c
+++ b/sound/pci/hda/patch_ca0132.c
@@ -1598,7 +1598,7 @@ static unsigned int dsp_chip_to_dsp_addx(unsigned int chip_addx,
 		return Y_OFF(chip_addx);
 	}
 
-	return (unsigned int)INVALID_CHIP_ADDRESS;
+	return INVALID_CHIP_ADDRESS;
 }
 
 /*
@@ -4540,7 +4540,7 @@ static int ca0132_init(struct hda_codec *codec)
 	int i;
 
 	spec->dsp_state = DSP_DOWNLOAD_INIT;
-	spec->curr_chip_addx = (unsigned int)INVALID_CHIP_ADDRESS;
+	spec->curr_chip_addx = INVALID_CHIP_ADDRESS;
 
 	snd_hda_power_up(codec);
 
-- 
1.8.1.2