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

[Martin Kaiser]

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 <l...@intel.com>
Signed-off-by: Martin Kaiser <mar...@kaiser.cx>
Reviewed-by: Fabien Dessenne <fabien.desse...@st.com>
---
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