[SRU][F/G][PATCH] Fix Sony Dualshock 4 crashes systems

[Alex Hung]

BugLink: https://bugs.launchpad.net/bugs/1935846

[Impact]

Sony Dualshock 4 controller crashes systems. This is the result of a
divide by zero when the driver processes requests from Steam and returns
invalid data. More details are in the patch description.

[Fix]

Check whether data is valid and retry up to 3 times if needed.

[Test Case]

Tested by the bug reporter of LP:1935846. No more crashes after applying
this patch.

[Where problems could occur]

None. The patch checks whether data is valid and retry 3 times before
return -EILSEQ if it still fails.

Roderick Colenbrander (1):
  HID: sony: Workaround for DS4 dongle hotplug kernel crash.

 drivers/hid/hid-sony.c | 34 ++++++++++++++++++++++++++++------
 1 file changed, 28 insertions(+), 6 deletions(-)

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2.7.4