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powernv/eeh: Add buffer for P7IOC hub error data 

Prevent ioda_eeh_hub_diag() from clobbering itself when called by supplying
a per-PHB buffer for P7IOC hub diagnostic data.  Take care to inform OPAL of
the correct size for the buffer.

[Small style change to the use of sizeof -- BenH]

Signed-off-by: Brian W Hart <hartb@linux.vnet.ibm.com>
Acked-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Brian W Hart 2013-12-20 13:06:01 -06:00 committed by Benjamin Herrenschmidt
parent 20acebdfae
commit ca1de5deb7
2 changed files with 5 additions and 14 deletions
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15
arch/powerpc/platforms/powernv/eeh-ioda.c
View File

@ -36,7 +36,6 @@
#include "powernv.h"
#include "pci.h"
static char *hub_diag = NULL;
static int ioda_eeh_nb_init = 0;
static int ioda_eeh_event(struct notifier_block *nb,
@ -140,15 +139,6 @@ static int ioda_eeh_post_init(struct pci_controller *hose)
ioda_eeh_nb_init = 1;
}
/* We needn't HUB diag-data on PHB3 */
if (phb->type == PNV_PHB_IODA1 && !hub_diag) {
hub_diag = (char *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
if (!hub_diag) {
pr_err("%s: Out of memory !\n", __func__);
return -ENOMEM;
}
}
#ifdef CONFIG_DEBUG_FS
if (phb->dbgfs) {
debugfs_create_file("err_injct_outbound", 0600,
@ -633,11 +623,10 @@ static void ioda_eeh_hub_diag_common(struct OpalIoP7IOCErrorData *data)
static void ioda_eeh_hub_diag(struct pci_controller *hose)
{
struct pnv_phb *phb = hose->private_data;
struct OpalIoP7IOCErrorData *data;
struct OpalIoP7IOCErrorData *data = &phb->diag.hub_diag;
long rc;
data = (struct OpalIoP7IOCErrorData *)ioda_eeh_hub_diag;
rc = opal_pci_get_hub_diag_data(phb->hub_id, data, PAGE_SIZE);
rc = opal_pci_get_hub_diag_data(phb->hub_id, data, sizeof(*data));
if (rc != OPAL_SUCCESS) {
pr_warning("%s: Failed to get HUB#%llx diag-data (%ld)\n",
__func__, phb->hub_id, rc);

4
arch/powerpc/platforms/powernv/pci.h
View File

@ -172,11 +172,13 @@ struct pnv_phb {
} ioda;
};
/* PHB status structure */
/* PHB and hub status structure */
union {
unsigned char blob[PNV_PCI_DIAG_BUF_SIZE];
struct OpalIoP7IOCPhbErrorData p7ioc;
struct OpalIoP7IOCErrorData hub_diag;
} diag;
};
extern struct pci_ops pnv_pci_ops;