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iwlwifi: pcie: avoid variable shadowing in TFD helpers

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The various TFD/TB helpers have two code paths depending on the
type of TFD supported, with variable shadowing due to the new if
branches. Move the fall-through code into else branches to avoid
variable shadowing. While doing so, rename some of the variables
and do some other cleanups (like removing void * casts of void *
pointers.)

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
This commit is contained in:
Johannes Berg 2016-09-09 09:34:46 +02:00 committed by Luca Coelho
parent 191167160c
commit cc2f41f84f
2 changed files with 35 additions and 35 deletions
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19
drivers/net/wireless/intel/iwlwifi/pcie/internal.h
View File

@ -497,23 +497,20 @@ void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, int ssn,
struct sk_buff_head *skbs);
void iwl_trans_pcie_tx_reset(struct iwl_trans *trans);
static inline u16 iwl_pcie_tfd_tb_get_len(struct iwl_trans *trans, void *tfd,
static inline u16 iwl_pcie_tfd_tb_get_len(struct iwl_trans *trans, void *_tfd,
u8 idx)
{
struct iwl_tfd *tfd_fh;
struct iwl_tfd_tb *tb;
if (trans->cfg->use_tfh) {
struct iwl_tfh_tfd *tfd_fh = (void *)tfd;
struct iwl_tfh_tb *tb = &tfd_fh->tbs[idx];
struct iwl_tfh_tfd *tfd = _tfd;
struct iwl_tfh_tb *tb = &tfd->tbs[idx];
return le16_to_cpu(tb->tb_len);
} else {
struct iwl_tfd *tfd = _tfd;
struct iwl_tfd_tb *tb = &tfd->tbs[idx];
return le16_to_cpu(tb->hi_n_len) >> 4;
}
tfd_fh = (void *)tfd;
tb = &tfd_fh->tbs[idx];
return le16_to_cpu(tb->hi_n_len) >> 4;
}
/*****************************************************

51
drivers/net/wireless/intel/iwlwifi/pcie/tx.c
View File

@ -337,28 +337,32 @@ static inline void *iwl_pcie_get_tfd(struct iwl_trans_pcie *trans_pcie,
}
static inline dma_addr_t iwl_pcie_tfd_tb_get_addr(struct iwl_trans *trans,
void *tfd, u8 idx)
void *_tfd, u8 idx)
{
struct iwl_tfd *tfd_fh;
struct iwl_tfd_tb *tb;
dma_addr_t addr;
if (trans->cfg->use_tfh) {
struct iwl_tfh_tfd *tfd_fh = (void *)tfd;
struct iwl_tfh_tb *tb = &tfd_fh->tbs[idx];
struct iwl_tfh_tfd *tfd = _tfd;
struct iwl_tfh_tb *tb = &tfd->tbs[idx];
return (dma_addr_t)(le64_to_cpu(tb->addr));
} else {
struct iwl_tfd *tfd = _tfd;
struct iwl_tfd_tb *tb = &tfd->tbs[idx];
dma_addr_t addr = get_unaligned_le32(&tb->lo);
dma_addr_t hi_len;
if (sizeof(dma_addr_t) <= sizeof(u32))
return addr;
hi_len = le16_to_cpu(tb->hi_n_len) & 0xF;
/*
* shift by 16 twice to avoid warnings on 32-bit
* (where this code never runs anyway due to the
* if statement above)
*/
return addr | ((hi_len << 16) << 16);
}
tfd_fh = (void *)tfd;
tb = &tfd_fh->tbs[idx];
addr = get_unaligned_le32(&tb->lo);
if (sizeof(dma_addr_t) > sizeof(u32))
addr |=
((dma_addr_t)(le16_to_cpu(tb->hi_n_len) & 0xF) << 16) << 16;
return addr;
}
static inline void iwl_pcie_tfd_set_tb(struct iwl_trans *trans, void *tfd,
@ -388,18 +392,17 @@ static inline void iwl_pcie_tfd_set_tb(struct iwl_trans *trans, void *tfd,
}
}
static inline u8 iwl_pcie_tfd_get_num_tbs(struct iwl_trans *trans, void *tfd)
static inline u8 iwl_pcie_tfd_get_num_tbs(struct iwl_trans *trans, void *_tfd)
{
struct iwl_tfd *tfd_fh;
if (trans->cfg->use_tfh) {
struct iwl_tfh_tfd *tfd_fh = (void *)tfd;
struct iwl_tfh_tfd *tfd = _tfd;
return le16_to_cpu(tfd_fh->num_tbs) & 0x1f;
return le16_to_cpu(tfd->num_tbs) & 0x1f;
} else {
struct iwl_tfd *tfd = _tfd;
return tfd->num_tbs & 0x1f;
}
tfd_fh = (void *)tfd;
return tfd_fh->num_tbs & 0x1f;
}
static void iwl_pcie_tfd_unmap(struct iwl_trans *trans,