[PATCH v2 3/3] mailbox: stm32-ipcc: cast void pointers to unsigned long

Martin Kaiser
2020-11-01T15:43:32Z

Now that the driver can be enabled by COMPILE_TEST, we see warnings on
64bit platforms when void pointers are cast to unsigned int (and
vice versa).

warning: cast to smaller integer type 'unsigned int' from 'void *'
unsigned int chan = (unsigned int)link->con_priv;
...
warning: cast to 'void *' from smaller integer type 'unsigned int'
ipcc->controller.chans[i].con_priv = (void *)i;

Update these casts to use unsigned long variables, which are the same
size as pointers on all platforms.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
---
changes in v2
- added this patch to fix COMPILE_TEST warnings

drivers/mailbox/stm32-ipcc.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/mailbox/stm32-ipcc.c b/drivers/mailbox/stm32-ipcc.c
index ab8fe56af948..b84e0587937c 100644
--- a/drivers/mailbox/stm32-ipcc.c
+++ b/drivers/mailbox/stm32-ipcc.c
@@ -144,11 +144,11 @@ static irqreturn_t stm32_ipcc_tx_irq(int irq, void *data)

static int stm32_ipcc_send_data(struct mbox_chan *link, void *data)
{
- unsigned int chan = (unsigned int)link->con_priv;
+ unsigned long chan = (unsigned long)link->con_priv;
struct stm32_ipcc *ipcc = container_of(link->mbox, struct stm32_ipcc,
controller);

- dev_dbg(ipcc->controller.dev, "%s: chan:%d\n", __func__, chan);
+ dev_dbg(ipcc->controller.dev, "%s: chan:%lu\n", __func__, chan);

/* set channel n occupied */
stm32_ipcc_set_bits(&ipcc->lock, ipcc->reg_proc + IPCC_XSCR,
@@ -163,7 +163,7 @@ static int stm32_ipcc_send_data(struct mbox_chan *link, void *data)

static int stm32_ipcc_startup(struct mbox_chan *link)
{
- unsigned int chan = (unsigned int)link->con_priv;
+ unsigned long chan = (unsigned long)link->con_priv;
struct stm32_ipcc *ipcc = container_of(link->mbox, struct stm32_ipcc,
controller);
int ret;
@@ -183,7 +183,7 @@ static int stm32_ipcc_startup(struct mbox_chan *link)

static void stm32_ipcc_shutdown(struct mbox_chan *link)
{
- unsigned int chan = (unsigned int)link->con_priv;
+ unsigned long chan = (unsigned long)link->con_priv;
struct stm32_ipcc *ipcc = container_of(link->mbox, struct stm32_ipcc,
controller);

@@ -206,7 +206,7 @@ static int stm32_ipcc_probe(struct platform_device *pdev)
struct device_node *np = dev->of_node;
struct stm32_ipcc *ipcc;
struct resource *res;
- unsigned int i;
+ unsigned long i;
int ret;
u32 ip_ver;
static const char * const irq_name[] = {"rx", "tx"};
@@ -265,7 +265,7 @@ static int stm32_ipcc_probe(struct platform_device *pdev)
irq_thread[i], IRQF_ONESHOT,
dev_name(dev), ipcc);
if (ret) {
- dev_err(dev, "failed to request irq %d (%d)\n", i, ret);
+ dev_err(dev, "failed to request irq %lu (%d)\n", i, ret);
goto err_clk;
}
}
--
2.20.1