diff options
| author | Thinh Nguyen <[email protected]> | 2021-05-12 20:17:09 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2021-05-21 14:25:07 +0200 |
| commit | 25dda9fc56bd90d45f9a4516bcfa5211e61b4290 (patch) | |
| tree | a3a1ff625004c3d327422fcc944d9717187690db /drivers/usb/cdns3/cdns3-debug.h | |
| parent | 4f2629ea67e7225c3fd292c7fe4f5b3c9d6392de (diff) | |
usb: dwc3: gadget: Properly track pending and queued SG
The driver incorrectly uses req->num_pending_sgs to track both the
number of pending and queued SG entries. It only prepares the next
request if the previous is done, and it doesn't update num_pending_sgs
until there is TRB completion interrupt. This may starve the controller
of more TRBs until the num_pending_sgs is decremented.
Fix this by decrementing the num_pending_sgs after they are queued and
properly track both num_mapped_sgs and num_queued_sgs.
Fixes: c96e6725db9d ("usb: dwc3: gadget: Correct the logic for queuing sgs")
Cc: <[email protected]>
Reported-by: Michael Grzeschik <[email protected]>
Tested-by: Michael Grzeschik <[email protected]>
Acked-by: Felipe Balbi <[email protected]>
Signed-off-by: Thinh Nguyen <[email protected]>
Link: https://lore.kernel.org/r/ba24591dbcaad8f244a3e88bd449bb7205a5aec3.1620874069.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-debug.h')
0 files changed, 0 insertions, 0 deletions