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author | Dominik Brodowski <linux@dominikbrodowski.net> | 2010-02-17 18:01:31 +0100 |
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committer | Dominik Brodowski <linux@dominikbrodowski.net> | 2010-02-17 18:01:31 +0100 |
commit | d700518a0e4d17a47321414e5e487ed53f4ae752 (patch) | |
tree | d50a2a1e225f09161a7a879f7013ad7bae1f4934 /drivers/pcmcia/cistpl.c | |
parent | pcmcia: handle error in serial_cs config calls (diff) | |
download | linux-d700518a0e4d17a47321414e5e487ed53f4ae752.tar.xz linux-d700518a0e4d17a47321414e5e487ed53f4ae752.zip |
pcmcia: use read_cis_mem return value
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Diffstat (limited to 'drivers/pcmcia/cistpl.c')
-rw-r--r-- | drivers/pcmcia/cistpl.c | 63 |
1 files changed, 44 insertions, 19 deletions
diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c index 602f574898dc..2f3622dd4b69 100644 --- a/drivers/pcmcia/cistpl.c +++ b/drivers/pcmcia/cistpl.c @@ -283,30 +283,32 @@ void pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr, ======================================================================*/ -static void read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, - size_t len, void *ptr) +static int read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, + size_t len, void *ptr) { struct cis_cache_entry *cis; - int ret; + int ret = 0; if (s->state & SOCKET_CARDBUS) - return; + return -EINVAL; mutex_lock(&s->ops_mutex); if (s->fake_cis) { if (s->fake_cis_len >= addr+len) memcpy(ptr, s->fake_cis+addr, len); - else + else { memset(ptr, 0xff, len); + ret = -EINVAL; + } mutex_unlock(&s->ops_mutex); - return; + return ret; } list_for_each_entry(cis, &s->cis_cache, node) { if (cis->addr == addr && cis->len == len && cis->attr == attr) { memcpy(ptr, cis->cache, len); mutex_unlock(&s->ops_mutex); - return; + return 0; } } mutex_unlock(&s->ops_mutex); @@ -326,6 +328,7 @@ static void read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, mutex_unlock(&s->ops_mutex); } } + return ret; } static void @@ -374,6 +377,7 @@ int verify_cis_cache(struct pcmcia_socket *s) { struct cis_cache_entry *cis; char *buf; + int ret; if (s->state & SOCKET_CARDBUS) return -EINVAL; @@ -390,9 +394,8 @@ int verify_cis_cache(struct pcmcia_socket *s) if (len > 256) len = 256; - pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf); - - if (memcmp(buf, cis->cache, len) != 0) { + ret = pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf); + if (ret || memcmp(buf, cis->cache, len) != 0) { kfree(buf); return -1; } @@ -425,6 +428,7 @@ int pcmcia_replace_cis(struct pcmcia_socket *s, } s->fake_cis_len = len; memcpy(s->fake_cis, data, len); + dev_info(&s->dev, "Using replacement CIS\n"); mutex_unlock(&s->ops_mutex); return 0; } @@ -478,11 +482,14 @@ static int follow_link(struct pcmcia_socket *s, tuple_t *tuple) { u_char link[5]; u_int ofs; + int ret; if (MFC_FN(tuple->Flags)) { /* Get indirect link from the MFC tuple */ - read_cis_cache(s, LINK_SPACE(tuple->Flags), + ret = read_cis_cache(s, LINK_SPACE(tuple->Flags), tuple->LinkOffset, 5, link); + if (ret) + return -1; ofs = get_unaligned_le32(link + 1); SPACE(tuple->Flags) = (link[0] == CISTPL_MFC_ATTR); /* Move to the next indirect link */ @@ -498,7 +505,9 @@ static int follow_link(struct pcmcia_socket *s, tuple_t *tuple) if (SPACE(tuple->Flags)) { /* This is ugly, but a common CIS error is to code the long link offset incorrectly, so we check the right spot... */ - read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link); + ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link); + if (ret) + return -1; if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) && (strncmp(link+2, "CIS", 3) == 0)) return ofs; @@ -506,7 +515,9 @@ static int follow_link(struct pcmcia_socket *s, tuple_t *tuple) /* Then, we try the wrong spot... */ ofs = ofs >> 1; } - read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link); + ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link); + if (ret) + return -1; if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) && (strncmp(link+2, "CIS", 3) == 0)) return ofs; @@ -518,6 +529,7 @@ int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, tuple_ { u_char link[2], tmp; int ofs, i, attr; + int ret; if (!s) return -EINVAL; @@ -532,7 +544,9 @@ int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, tuple_ if (link[1] == 0xff) { link[0] = CISTPL_END; } else { - read_cis_cache(s, attr, ofs, 2, link); + ret = read_cis_cache(s, attr, ofs, 2, link); + if (ret) + return -1; if (link[0] == CISTPL_NULL) { ofs++; continue; } @@ -544,7 +558,9 @@ int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, tuple_ if (ofs < 0) return -ENOSPC; attr = SPACE(tuple->Flags); - read_cis_cache(s, attr, ofs, 2, link); + ret = read_cis_cache(s, attr, ofs, 2, link); + if (ret) + return -1; } /* Is this a link tuple? Make a note of it */ @@ -558,12 +574,16 @@ int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, tuple_ case CISTPL_LONGLINK_A: HAS_LINK(tuple->Flags) = 1; LINK_SPACE(tuple->Flags) = attr | IS_ATTR; - read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset); + ret = read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset); + if (ret) + return -1; break; case CISTPL_LONGLINK_C: HAS_LINK(tuple->Flags) = 1; LINK_SPACE(tuple->Flags) = attr & ~IS_ATTR; - read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset); + ret = read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset); + if (ret) + return -1; break; case CISTPL_INDIRECT: HAS_LINK(tuple->Flags) = 1; @@ -575,7 +595,9 @@ int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, tuple_ LINK_SPACE(tuple->Flags) = attr; if (function == BIND_FN_ALL) { /* Follow all the MFC links */ - read_cis_cache(s, attr, ofs+2, 1, &tmp); + ret = read_cis_cache(s, attr, ofs+2, 1, &tmp); + if (ret) + return -1; MFC_FN(tuple->Flags) = tmp; } else { /* Follow exactly one of the links */ @@ -616,6 +638,7 @@ int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, tuple_ int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple) { u_int len; + int ret; if (!s) return -EINVAL; @@ -626,9 +649,11 @@ int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple) tuple->TupleDataLen = tuple->TupleLink; if (len == 0) return 0; - read_cis_cache(s, SPACE(tuple->Flags), + ret = read_cis_cache(s, SPACE(tuple->Flags), tuple->CISOffset + tuple->TupleOffset, _MIN(len, tuple->TupleDataMax), tuple->TupleData); + if (ret) + return -1; return 0; } |