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Date: Mon, 6 Mar 2017 16:34:08 -0800
From: Joe Perches <joe@...ches.com>
To: SF Markus Elfring <elfring@...rs.sourceforge.net>,
Faisal Latif <faisal.latif@...el.com>
Cc: Doug Ledford <dledford@...hat.com>,
Sean Hefty <sean.hefty@...el.com>,
Hal Rosenstock <hal.rosenstock@...il.com>,
linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] IB/nes: Neaten nes_alloc_mw
Convert the function to follow more typical kernel style.
Use an error return block instead of individual returns.
Reduces the object code size a trivial amount.
$ size drivers/infiniband/hw/nes/nes_verbs.o*
text data bss dec hex filename
26864 96 12 26972 695c drivers/infiniband/hw/nes/nes_verbs.o.new
26932 96 12 27040 69a0 drivers/infiniband/hw/nes/nes_verbs.o.old
Signed-off-by: Joe Perches <joe@...ches.com>
---
Markus, please try to improve the code for
human readers instead of doing these mechanical
conversions.
Something like the below seems nicer to me.
I hope one day it'll seem nicer to you too
and you make the effort to understand and
then fix the code style a little more than
doing those apparently completely mindless
conversions.
drivers/infiniband/hw/nes/nes_verbs.c | 73 ++++++++++++++++++++---------------
1 file changed, 42 insertions(+), 31 deletions(-)
diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index ccf0a4cffe9c..5fe5af39f834 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/drivers/infiniband/hw/nes/nes_verbs.c
@@ -86,15 +86,15 @@ static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
next_stag_index %= nesadapter->max_mr;
ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
- nesadapter->max_mr, &stag_index, &next_stag_index, NES_RESOURCE_MW);
- if (ret) {
+ nesadapter->max_mr, &stag_index,
+ &next_stag_index, NES_RESOURCE_MW);
+ if (ret)
return ERR_PTR(ret);
- }
nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
if (!nesmr) {
- nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
- return ERR_PTR(-ENOMEM);
+ ret = -ENOMEM;
+ goto err_free_res;
}
stag = stag_index << 8;
@@ -102,49 +102,55 @@ static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
stag += (u32)stag_key;
nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
- stag, stag_index);
+ stag, stag_index);
/* Register the region with the adapter */
cqp_request = nes_get_cqp_request(nesdev);
- if (cqp_request == NULL) {
- kfree(nesmr);
- nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
- return ERR_PTR(-ENOMEM);
+ if (!cqp_request) {
+ ret = -ENOMEM;
+ goto err_kfree;
}
cqp_request->waiting = 1;
cqp_wqe = &cqp_request->cqp_wqe;
cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
- cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
- NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
- NES_CQP_STAG_REM_ACC_EN);
+ cpu_to_le32((NES_CQP_ALLOCATE_STAG |
+ NES_CQP_STAG_RIGHTS_REMOTE_READ |
+ NES_CQP_STAG_RIGHTS_REMOTE_WRITE |
+ NES_CQP_STAG_VA_TO |
+ NES_CQP_STAG_REM_ACC_EN));
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
- set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
- set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
+ set_wqe_32bit_value(cqp_wqe->wqe_words,
+ NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX,
+ nespd->pd_id & 0x00007fff);
+ set_wqe_32bit_value(cqp_wqe->wqe_words,
+ NES_CQP_STAG_WQE_STAG_IDX,
+ stag);
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request);
/* Wait for CQP */
- ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
- NES_EVENT_TIMEOUT);
- nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
- " CQP Major:Minor codes = 0x%04X:0x%04X.\n",
- stag, ret, cqp_request->major_code, cqp_request->minor_code);
- if ((!ret) || (cqp_request->major_code)) {
- nes_put_cqp_request(nesdev, cqp_request);
- kfree(nesmr);
- nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
- if (!ret) {
- return ERR_PTR(-ETIME);
- } else {
- return ERR_PTR(-ENOMEM);
- }
- }
+ ret = wait_event_timeout(cqp_request->waitq,
+ cqp_request->request_done != 0,
+ NES_EVENT_TIMEOUT);
+
+ nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u, CQP Major:Minor codes = 0x%04X:0x%04X\n",
+ stag, ret, cqp_request->major_code, cqp_request->minor_code);
+
nes_put_cqp_request(nesdev, cqp_request);
+ if (!ret) {
+ ret = -ETIME;
+ goto err_kfree;
+ }
+ if (cqp_request->major_code) {
+ ret = -ENOMEM;
+ goto err_kfree;
+ }
+
nesmr->ibmw.rkey = stag;
nesmr->mode = IWNES_MEMREG_TYPE_MW;
ibmw = &nesmr->ibmw;
@@ -152,8 +158,13 @@ static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd, enum ib_mw_type type,
nesmr->pbls_used = 0;
return ibmw;
-}
+err_kfree:
+ kfree(nesmr);
+err_free_res:
+ nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
+ return ERR_PTR(ret);
+}
/**
* nes_dealloc_mw
--
2.10.0.rc2.1.g053435c
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