[bug report] [SCSI] mvumi: GFP_KERNEL under spin lock

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


Hello Jianyun Li,

The patch f0c568a478f0: "[SCSI] mvumi: Add Marvell UMI driver" from 
May 11, 2011, leads to the following warning:
drivers/scsi/mvumi.c:121 mvumi_alloc_mem_resource()
	 error: scheduling with locks held: 'spin_lock:host_lock'

The problem is that we do a couple GPF_KERNEL allocations in
mvumi_alloc_mem_resource() and this static analysis program sees a path
where that function is called with spin_locks held.

mvumi_isr_handler() <- takes a spin lock
-> mvumi_handshake()
   -> mvumi_init_data()
      -> mvumi_alloc_mem_resource() <- GFP_KERNEL

The IRQ handler does print a warning before calling mvumi_handshake()
so it seems like this path doesn't get exercised very much.

regards,
dan carpenter

--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [Share Photos]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Photos]     [Yosemite]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

Add to Google Powered by Linux