On 6/11/24 00:24, Douglas Anderson wrote:
While trying to reproduce -EBUSY errors that our lab was getting in suspend/resume testing, I ended up finding a whole pile of problems with the Qualcomm GENI serial driver. I've posted a fix for the -EBUSY issue separately [1]. This series is fixing all of the Qualcomm GENI problems that I found. As far as I can tell most of the problems have been in the Qualcomm GENI serial driver since inception, but it can be noted that the behavior got worse with the new kfifo changes. Previously when the OS took data out of the circular queue we'd just spit stale data onto the serial port. Now we'll hard lockup. :-P I've tried to break this series up as much as possible to make it easier to understand but the final patch is still a lot of change at once. Hopefully it's OK.
Tested-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> Konrad
