From: Michael Holzheu Date: Tue, 10 Jul 2007 09:24:15 +0000 (+0200) Subject: [S390] Program check in diag 210 under 31 bit X-Git-Tag: v2.6.23-rc1~1155^2~7 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dc4123303b54657389c952049bf5738dd753d004;p=linux-2.6 [S390] Program check in diag 210 under 31 bit If a virtual address is passed to the diag210 function under 31 bit, we get a programming exception, since diag 210 only works with physical addresses. To fix this, the content of the diag210 data structure is copied to a local structure and the physical address of that structure is passed to diagnose 210. Signed-off-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- diff --git a/drivers/s390/cio/device_id.c b/drivers/s390/cio/device_id.c index 997f468745..60b9347f7c 100644 --- a/drivers/s390/cio/device_id.c +++ b/drivers/s390/cio/device_id.c @@ -27,7 +27,6 @@ /* * diag210 is used under VM to get information about a virtual device */ -#ifdef CONFIG_64BIT int diag210(struct diag210 * addr) { @@ -43,6 +42,7 @@ diag210(struct diag210 * addr) spin_lock_irqsave(&diag210_lock, flags); diag210_tmp = *addr; +#ifdef CONFIG_64BIT asm volatile( " lhi %0,-1\n" " sam31\n" @@ -51,19 +51,8 @@ diag210(struct diag210 * addr) " srl %0,28\n" "1: sam64\n" EX_TABLE(0b,1b) - : "=&d" (ccode) : "a" (__pa(&diag210_tmp)) : "cc", "memory"); - - *addr = diag210_tmp; - spin_unlock_irqrestore(&diag210_lock, flags); - - return ccode; -} + : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory"); #else -int -diag210(struct diag210 * addr) -{ - int ccode; - asm volatile( " lhi %0,-1\n" " diag %1,0,0x210\n" @@ -71,11 +60,14 @@ diag210(struct diag210 * addr) " srl %0,28\n" "1:\n" EX_TABLE(0b,1b) - : "=&d" (ccode) : "a" (__pa(addr)) : "cc", "memory"); + : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory"); +#endif + + *addr = diag210_tmp; + spin_unlock_irqrestore(&diag210_lock, flags); return ccode; } -#endif /* * Input :