dfa7c4d869
parport_pc_probe_port() creates the own 'parport_pc' device if the device argument is NULL. Then parport_pc_probe_port() doesn't initialize the dma_mask and coherent_dma_mask of the device and calls dma_alloc_coherent with it. dma_alloc_coherent fails because dma_alloc_coherent() doesn't accept the uninitialized dma_mask: http://lkml.org/lkml/2009/6/16/150 Long ago, X86_32 and X86_64 had the own dma_alloc_coherent implementations; X86_32 accepted a device having dma_mask that is not initialized however X86_64 didn't. When we merged them, we chose to prohibit a device having dma_mask that is not initialized. I think that it's good to require drivers to set up dma_mask (and coherent_dma_mask) properly if the drivers want DMA. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reported-by: Malcom Blaney <malcolm.blaney@maptek.com.au> Tested-by: Malcom Blaney <malcolm.blaney@maptek.com.au> Cc: stable@kernel.org Signed-off-by: Alan Cox <alan@linux.intel.com> Acked-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| .. | ||
| BUGS-parport | ||
| ChangeLog | ||
| Kconfig | ||
| Makefile | ||
| TODO-parport | ||
| daisy.c | ||
| ieee1284.c | ||
| ieee1284_ops.c | ||
| multiface.h | ||
| parport_amiga.c | ||
| parport_atari.c | ||
| parport_ax88796.c | ||
| parport_cs.c | ||
| parport_gsc.c | ||
| parport_gsc.h | ||
| parport_ip32.c | ||
| parport_mfc3.c | ||
| parport_pc.c | ||
| parport_serial.c | ||
| parport_sunbpp.c | ||
| probe.c | ||
| procfs.c | ||
| share.c | ||