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| author | Liu Gang <Gang.Liu@freescale.com> | 2011-11-02 21:39:07 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-03 00:07:01 +0100 |
| commit | e80dd9a7bca4057d5a09d1ba94a7ba0791e7426a (patch) | |
| tree | b2be7b812974cdcc769df2480f2484d887092b31 /arch | |
| parent | drivers/rapidio/rio-scan.c: use discovered bit to test if enumeration is comp... (diff) | |
| download | linux-e80dd9a7bca4057d5a09d1ba94a7ba0791e7426a.tar.xz linux-e80dd9a7bca4057d5a09d1ba94a7ba0791e7426a.zip | |
arch/powerpc/sysdev/fsl_rio.c: release rapidio port I/O region resource if port failed to initialize
The "struct rio_mport" contains a member of master port I/O memory
resource structure "struct resource iores". This resource will be read
from device tree and be used for rapidio R/W transaction memory space.
Rapidio requests the port I/O memory resource under the root resource
"iomem_resource".
struct rio_mport *port;
port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
request_resource(&iomem_resource, &port->iores);
When port failed to initialize, allocated "rio_mport" structure memory
will be freed, and the port I/O memory resource structure pointer
"&port->iores" will be invalid. If other requests resource under
"iomem_resource", "&port->iores" node may be operated in the child
resources list and this will cause the system to crash.
So the requested port I/O memory resource should be released before
freeing allocated "rio_mport" structure.
Signed-off-by: Liu Gang <Gang.Liu@freescale.com>
Acked-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/sysdev/fsl_rio.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c index c65f75aa7ff7..22ffccd8bef5 100644 --- a/arch/powerpc/sysdev/fsl_rio.c +++ b/arch/powerpc/sysdev/fsl_rio.c @@ -1608,6 +1608,7 @@ int fsl_rio_setup(struct platform_device *dev) return 0; err: iounmap(priv->regs_win); + release_resource(&port->iores); err_res: kfree(priv); err_priv: |