From: Julia Lawall <julia.law...@lip6.fr> The data referenced by an interrupt handler should not be freed before the interrupt is ended. The handler is bfin_crypto_crc_handler. It may refer to crc->regs, which is released by the iounmap.
Furthermore, the second argument to all calls to free_irq is incorrect. It should be the same as the last argument of request_irq, which is crc, rather than crc->dev. The semantic match that finds the first problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @fn exists@ expression list es; expression a,b; identifier f; @@ if (...) { ... when any free_irq(a,b); ... when any f(es); ... when any return ...; } @@ expression list fn.es; expression fn.a,fn.b; identifier fn.f; @@ *f(es); ... when any *free_irq(a,b); // </smpl> Signed-off-by: Julia Lawall <julia.law...@lip6.fr> --- Not compiled. I have not observed the problems in practice; the code just looks suspicious. drivers/crypto/bfin_crc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/bfin_crc.c b/drivers/crypto/bfin_crc.c index a22f1a9..827913d 100644 --- a/drivers/crypto/bfin_crc.c +++ b/drivers/crypto/bfin_crc.c @@ -694,7 +694,7 @@ out_error_dma: dma_free_coherent(&pdev->dev, PAGE_SIZE, crc->sg_cpu, crc->sg_dma); free_dma(crc->dma_ch); out_error_irq: - free_irq(crc->irq, crc->dev); + free_irq(crc->irq, crc); out_error_unmap: iounmap((void *)crc->regs); out_error_free_mem: @@ -720,10 +720,10 @@ static int bfin_crypto_crc_remove(struct platform_device *pdev) crypto_unregister_ahash(&algs); tasklet_kill(&crc->done_task); - iounmap((void *)crc->regs); free_dma(crc->dma_ch); if (crc->irq > 0) - free_irq(crc->irq, crc->dev); + free_irq(crc->irq, crc); + iounmap((void *)crc->regs); kfree(crc); return 0; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
