AuxXxilium/redpill-lkm5
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fix kernel warning log "BUG: sleeping function called from invalid context at mm/slab.h"

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This commit is contained in:
Jim Ma 2023-05-04 16:25:15 +08:00
parent e9702c3a8c
commit b33f2bc221
1 changed files with 16 additions and 6 deletions
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16
internal/uart/vuart_virtual_irq.c
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@ -62,7 +62,10 @@ static int virq_thread(void *data)
int vuart_enable_interrupts(struct serial8250_16550A_vdev *vdev)
{
int out;
int out, kmc;
kmc = 0;
retry:
pr_loc_dbg("Enabling vIRQ for ttyS%d", vdev->line);
lock_vuart(vdev);
@ -78,11 +81,18 @@ int vuart_enable_interrupts(struct serial8250_16550A_vdev *vdev)
goto error_unlock_free;
}
if (!(vdev->virq_queue = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL)) ||
!(vdev->virq_thread = kmalloc(sizeof(struct task_struct), GFP_KERNEL))) {
// by jim3ma: fix kernel warning log "BUG: sleeping function called from invalid context at mm/slab.h"
if (!(vdev->virq_queue = kmalloc(sizeof(wait_queue_head_t), GFP_ATOMIC)) ||
!(vdev->virq_thread = kmalloc(sizeof(struct task_struct), GFP_ATOMIC))) {
if (kmc == 10) {
out = -ENOMEM;
pr_loc_crt("kernel memory alloc failure - tried to reserve memory for vIRQ structures");
goto error_unlock_free;
} else {
unlock_vuart(vdev);
kmc ++;
goto retry;
}
}
init_waitqueue_head(vdev->virq_queue);