Commits
Daniel Baluta committed 6bfa0c442b6
MLK-21144 ASoC: fsl: Fix crash with multiple open/close Because we are re-initializing the proxy at close it might happen that work is still pending which causes the following crash: [ 94.699835] Unable to handle kernel NULL pointer dereference at virtual address 00000008 [ 94.707923] Mem abort info: [ 94.710722] Exception class = DABT (current EL), IL = 32 bits [ 94.716637] SET = 0, FnV = 0 [ 94.719686] EA = 0, S1PTW = 0 [ 94.722822] Data abort info: [ 94.725698] ISV = 0, ISS = 0x00000005 [ 94.729530] CM = 0, WnR = 0 [ 94.732504] user pgtable: 4k pages, 48-bit VAs, pgd = ffff8008d9ba3000 [ 94.739035] [0000000000000008] *pgd=0000000938419003, *pud=0000000000000000 [ 94.746015] Internal error: Oops: 96000005 [#1] PREEMPT SMP [ 94.751589] Modules linked in: [ 94.754652] CPU: 0 PID: 2068 Comm: kworker/0:2 Not tainted 4.14.98-dirty #75 [ 94.761700] Hardware name: Freescale i.MX8QM MEK (DT) [ 94.766768] task: ffff8008f23ae200 task.stack: ffff000014378000 [ 94.772705] PC is at process_one_work+0x34/0x414 [ 94.777325] LR is at process_one_work+0x1e0/0x414 In order to fix this, we make sure that no work is pending before starting the re-initialization. Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com> Reviewed-by: Shengjiu Wang <shengjiu.wang@nxp.com> (cherry picked from commit 2c00c24be5f8b63636e3f9005e15a3de42058438)