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vme: tsi148: Only store VME bus errors if they will be checked

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The TSI148 driver provides an optional mechanism for ensuring that errors
resulting from posted transfers are caught whilst still relevant. To do this
errors are stored in a link list. If bus errors are not checked, this list
would grow until available memory had been exhausted.

Only store the errors in a link list if error detection is switched on.

Reported-by: De Roo, Steven <steven.deroo@arcelormittal.com>
Signed-off-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martyn Welch 2013-06-11 11:20:17 +01:00 committed by Greg Kroah-Hartman
parent f3cbfa5d6e
commit e31c51e4a1
1 changed files with 17 additions and 11 deletions
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28
drivers/vme/bridges/vme_tsi148.c
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@ -169,7 +169,7 @@ static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge)
unsigned int error_addr_high, error_addr_low;
unsigned long long error_addr;
u32 error_attrib;
struct vme_bus_error *error;
struct vme_bus_error *error = NULL;
struct tsi148_driver *bridge;
bridge = tsi148_bridge->driver_priv;
@ -186,16 +186,22 @@ static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge)
"Occurred\n");
}
error = kmalloc(sizeof(struct vme_bus_error), GFP_ATOMIC);
if (error) {
error->address = error_addr;
error->attributes = error_attrib;
list_add_tail(&error->list, &tsi148_bridge->vme_errors);
} else {
dev_err(tsi148_bridge->parent, "Unable to alloc memory for "
"VMEbus Error reporting\n");
dev_err(tsi148_bridge->parent, "VME Bus Error at address: "
"0x%llx, attributes: %08x\n", error_addr, error_attrib);
if (err_chk) {
error = kmalloc(sizeof(struct vme_bus_error), GFP_ATOMIC);
if (error) {
error->address = error_addr;
error->attributes = error_attrib;
list_add_tail(&error->list, &tsi148_bridge->vme_errors);
} else {
dev_err(tsi148_bridge->parent,
"Unable to alloc memory for VMEbus Error reporting\n");
}
}
if (!error) {
dev_err(tsi148_bridge->parent,
"VME Bus Error at address: 0x%llx, attributes: %08x\n",
error_addr, error_attrib);
}
/* Clear Status */