diff options
Diffstat (limited to 'drivers/staging/unisys/visorutil/memregion_direct.c')
-rw-r--r-- | drivers/staging/unisys/visorutil/memregion_direct.c | 46 |
1 files changed, 16 insertions, 30 deletions
diff --git a/drivers/staging/unisys/visorutil/memregion_direct.c b/drivers/staging/unisys/visorutil/memregion_direct.c index 33522cc8c22c..eb7422fbe20f 100644 --- a/drivers/staging/unisys/visorutil/memregion_direct.c +++ b/drivers/staging/unisys/visorutil/memregion_direct.c @@ -20,7 +20,6 @@ * channel memory (in main memory of the host system) from code running in * a virtual partition. */ -#include "uniklog.h" #include "timskmod.h" #include "memregion.h" @@ -41,12 +40,12 @@ struct memregion * visor_memregion_create(HOSTADDRESS physaddr, ulong nbytes) { struct memregion *rc = NULL; - struct memregion *memregion = kzalloc(sizeof(*memregion), - GFP_KERNEL | __GFP_NORETRY); - if (memregion == NULL) { - ERRDRV("visor_memregion_create allocation failed"); + struct memregion *memregion; + + memregion = kzalloc(sizeof(*memregion), GFP_KERNEL | __GFP_NORETRY); + if (memregion == NULL) return NULL; - } + memregion->physaddr = physaddr; memregion->nbytes = nbytes; memregion->overlapped = FALSE; @@ -70,25 +69,19 @@ visor_memregion_create_overlapped(struct memregion *parent, ulong offset, { struct memregion *memregion = NULL; - if (parent == NULL) { - ERRDRV("%s parent is NULL", __func__); + if (parent == NULL) return NULL; - } - if (parent->mapped == NULL) { - ERRDRV("%s parent is not mapped!", __func__); + + if (parent->mapped == NULL) return NULL; - } + if ((offset >= parent->nbytes) || - ((offset + nbytes) >= parent->nbytes)) { - ERRDRV("%s range (%lu,%lu) out of parent range", - __func__, offset, nbytes); + ((offset + nbytes) >= parent->nbytes)) return NULL; - } + memregion = kzalloc(sizeof(*memregion), GFP_KERNEL|__GFP_NORETRY); - if (memregion == NULL) { - ERRDRV("%s allocation failed", __func__); + if (memregion == NULL) return NULL; - } memregion->physaddr = parent->physaddr + offset; memregion->nbytes = nbytes; @@ -106,17 +99,11 @@ mapit(struct memregion *memregion) ulong nbytes = memregion->nbytes; memregion->requested = FALSE; - if (!request_mem_region(physaddr, nbytes, MYDRVNAME)) - ERRDRV("cannot reserve channel memory @0x%lx for 0x%lx-- no big deal", - physaddr, nbytes); - else + if (request_mem_region(physaddr, nbytes, MYDRVNAME)) memregion->requested = TRUE; memregion->mapped = ioremap_cache(physaddr, nbytes); - if (memregion->mapped == NULL) { - ERRDRV("cannot ioremap_cache channel memory @0x%lx for 0x%lx", - physaddr, nbytes); + if (!memregion->mapped) return FALSE; - } return TRUE; } @@ -180,10 +167,9 @@ memregion_readwrite(BOOL is_write, struct memregion *memregion, ulong offset, void *local, ulong nbytes) { - if (offset + nbytes > memregion->nbytes) { - ERRDRV("memregion_readwrite offset out of range!!"); + if (offset + nbytes > memregion->nbytes) return -EIO; - } + if (is_write) memcpy_toio(memregion->mapped + offset, local, nbytes); else |