lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

rapidio: fix use of non-compatible registers

Browse Source 
Replace/remove use of RIO v.1.2 registers/bits that are not
forward-compatible with newer versions of RapidIO specification.

RapidIO specification v.1.3 removed Write Port CSR, Doorbell CSR,
Mailbox CSR and Mailbox and Doorbell bits of the PEF CAR.

Use of removed (since RIO v.1.3) register bits affects users of
currently available 1.3 and 2.x compliant devices who may use not so
recent kernel versions.

Removing checks for unsupported bits makes corresponding routines
compatible with all versions of RapidIO specification.  Therefore,
backporting makes stable kernel versions compliant with RIO v.1.3 and
later as well.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Li Yang <leoli@freescale.com>
Cc: Thomas Moll <thomas.moll@sysgo.com>
Cc: Chul Kim <chul.kim@idt.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexandre Bounine
2011-08-25 15:59:13 -07:00
committed by Linus Torvalds
parent 439423f689
commit 284fb68d00
3 changed files with 18 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/rapidio/rio-scan.c
View File

@@ -505,8 +505,7 @@ static struct rio_dev __devinit *rio_setup_device(struct rio_net *net,
rdev->dev.dma_mask = &rdev->dma_mask;
rdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
if ((rdev->pef & RIO_PEF_INB_DOORBELL) &&
(rdev->dst_ops & RIO_DST_OPS_DOORBELL))
if (rdev->dst_ops & RIO_DST_OPS_DOORBELL)
rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE],
0, 0xffff);