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| author |   Arnd Bergmann <arnd@arndb.de> | 2025-06-20 15:09:53 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2025-06-23 14:21:32 +0100 |
| commit | 95b6759a81833d0e8c7456430186c2f6d174764e (patch) | |
| tree | b640b6a61c2ac1bf2b3eb3a89ceb88e2d8328b06 | |
| parent | atm: clip: prevent NULL deref in clip_push() (diff) | |
| download | wireguard-linux-95b6759a81833d0e8c7456430186c2f6d174764e.tar.xz wireguard-linux-95b6759a81833d0e8c7456430186c2f6d174764e.zip | |
net: qed: reduce stack usage for TLV processing
clang gets a bit confused by the code in the qed_mfw_process_tlv_req and
ends up spilling registers to the stack hundreds of times. When sanitizers
are enabled, this can end up blowing the stack warning limit:
drivers/net/ethernet/qlogic/qed/qed_mng_tlv.c:1244:5: error: stack frame size (1824) exceeds limit (1280) in 'qed_mfw_process_tlv_req' [-Werror,-Wframe-larger-than]
Apparently the problem is the complexity of qed_mfw_update_tlvs()
after inlining, and marking the four main branches of that function
as noinline_for_stack makes this problem completely go away, the stack
usage goes down to 100 bytes.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/qlogic/qed/qed_mng_tlv.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/ethernet/qlogic/qed/qed_mng_tlv.c b/drivers/net/ethernet/qlogic/qed/qed_mng_tlv.c index f55eed092f25..7d78f072b0a1 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_mng_tlv.c +++ b/drivers/net/ethernet/qlogic/qed/qed_mng_tlv.c @@ -242,7 +242,7 @@ static int qed_mfw_get_tlv_group(u8 tlv_type, u8 *tlv_group) } /* Returns size of the data buffer or, -1 in case TLV data is not available. */ -static int +static noinline_for_stack int qed_mfw_get_gen_tlv_value(struct qed_drv_tlv_hdr *p_tlv, struct qed_mfw_tlv_generic *p_drv_buf, struct qed_tlv_parsed_buf *p_buf) @@ -304,7 +304,7 @@ qed_mfw_get_gen_tlv_value(struct qed_drv_tlv_hdr *p_tlv, return -1; } -static int +static noinline_for_stack int qed_mfw_get_eth_tlv_value(struct qed_drv_tlv_hdr *p_tlv, struct qed_mfw_tlv_eth *p_drv_buf, struct qed_tlv_parsed_buf *p_buf) @@ -438,7 +438,7 @@ qed_mfw_get_tlv_time_value(struct qed_mfw_tlv_time *p_time, return QED_MFW_TLV_TIME_SIZE; } -static int +static noinline_for_stack int qed_mfw_get_fcoe_tlv_value(struct qed_drv_tlv_hdr *p_tlv, struct qed_mfw_tlv_fcoe *p_drv_buf, struct qed_tlv_parsed_buf *p_buf) @@ -1073,7 +1073,7 @@ qed_mfw_get_fcoe_tlv_value(struct qed_drv_tlv_hdr *p_tlv, return -1; } -static int +static noinline_for_stack int qed_mfw_get_iscsi_tlv_value(struct qed_drv_tlv_hdr *p_tlv, struct qed_mfw_tlv_iscsi *p_drv_buf, struct qed_tlv_parsed_buf *p_buf) |