On 15/03/2021 19:58, Tong Zhang wrote:
request_irq() wont accept a name which contains slash so we need to
repalce it with something else -- otherwise it will trigger a warning
and the entry in /proc/irq/ will not be created
since the .name might be used by userspace and we don't want to break
userspace, so we are changing the parameters passed to request_irq()
[1.565966] name 'pci-das6402/16'
[1.566149] WARNING: CPU: 0 PID: 184 at fs/proc/generic.c:180
__xlate_proc_name+0x93/0xb0
[1.568923] RIP: 0010:__xlate_proc_name+0x93/0xb0
[1.574200] Call Trace:
[1.574722] proc_mkdir+0x18/0x20
[1.576629] request_threaded_irq+0xfe/0x160
[1.576859] auto_attach+0x60a/0xc40 [cb_pcidas64]
Suggested-by: Ian Abbott
Signed-off-by: Tong Zhang
---
v2: revert changes to .name field so that we dont break userspace
drivers/staging/comedi/drivers/cb_pcidas64.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/comedi/drivers/cb_pcidas64.c
b/drivers/staging/comedi/drivers/cb_pcidas64.c
index fa987bb0e7cd..6d3ba399a7f0 100644
--- a/drivers/staging/comedi/drivers/cb_pcidas64.c
+++ b/drivers/staging/comedi/drivers/cb_pcidas64.c
@@ -4035,7 +4035,7 @@ static int auto_attach(struct comedi_device *dev,
init_stc_registers(dev);
retval = request_irq(pcidev->irq, handle_interrupt, IRQF_SHARED,
-dev->board_name, dev);
+"cb_pcidas64", dev);
if (retval) {
dev_dbg(dev->class_dev, "unable to allocate irq %u\n",
pcidev->irq);
Looks good.
Reviewed-by: Ian Abbott
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