redonkable/alistair23-linux
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s390/pci: no msleep in potential IRQ context

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The PCI instructions may be used in IRQ context so scheduling is forbidden.
Use udelay and shorten the delay since we are now polling.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Glauber 2012-12-05 14:43:25 +01:00 committed by Martin Schwidefsky
parent bafff1743f
commit c59b9f9265
1 changed files with 5 additions and 5 deletions
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10
arch/s390/include/asm/pci_insn.h
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@ -3,7 +3,7 @@
#include <linux/delay.h>
#define ZPCI_INSN_BUSY_DELAY 1 /* 1 millisecond */
#define ZPCI_INSN_BUSY_DELAY 1 /* 1 microsecond */
/* Load/Store status codes */
#define ZPCI_PCI_ST_FUNC_NOT_ENABLED 4
@ -138,7 +138,7 @@ static inline int rpcit_instr(u64 fn, u64 addr, u64 range)
do {
cc = __rpcit(fn, addr, range, &status);
if (cc == 2)
msleep(ZPCI_INSN_BUSY_DELAY);
udelay(ZPCI_INSN_BUSY_DELAY);
} while (cc == 2);
if (cc)
@ -198,7 +198,7 @@ static inline int pcilg_instr(u64 *data, u64 req, u64 offset)
do {
cc = __pcilg(data, req, offset, &status);
if (cc == 2)
msleep(ZPCI_INSN_BUSY_DELAY);
udelay(ZPCI_INSN_BUSY_DELAY);
} while (cc == 2);
if (cc) {
@ -236,7 +236,7 @@ static inline int pcistg_instr(u64 data, u64 req, u64 offset)
do {
cc = __pcistg(data, req, offset, &status);
if (cc == 2)
msleep(ZPCI_INSN_BUSY_DELAY);
udelay(ZPCI_INSN_BUSY_DELAY);
} while (cc == 2);
if (cc)
@ -268,7 +268,7 @@ static inline int pcistb_instr(const u64 *data, u64 req, u64 offset)
do {
cc = __pcistb(data, req, offset, &status);
if (cc == 2)
msleep(ZPCI_INSN_BUSY_DELAY);
udelay(ZPCI_INSN_BUSY_DELAY);
} while (cc == 2);
if (cc)