mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-12 19:44:51 -04:00
Code Issues Packages Projects Releases Wiki Activity

um: chan_user: catch EINTR when reading and writing

Browse Source 
If the read/write function returns an error then we expect to see an
event/IRQ later on. However, this will only happen after an EAGAIN as we
are using edge based event triggering.

As such, EINTR needs to be caught should it happen.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Link: https://patch.msgid.link/20231018123643.1255813-2-benjamin@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg
2023-10-18 14:36:41 +02:00
committed by Johannes Berg
parent c140a5bd5d
commit c6c4cbaa01
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/um/drivers/chan_user.c
View File

@@ -23,7 +23,7 @@ int generic_read(int fd, __u8 *c_out, void *unused)
{
int n;
n = read(fd, c_out, sizeof(*c_out));
CATCH_EINTR(n = read(fd, c_out, sizeof(*c_out)));
if (n > 0)
return n;
else if (n == 0)
@@ -39,7 +39,7 @@ int generic_write(int fd, const __u8 *buf, size_t n, void *unused)
{
int err;
err = write(fd, buf, n);
CATCH_EINTR(err = write(fd, buf, n));
if (err > 0)
return err;
else if (errno == EAGAIN)