From: Andy Grover <agrover@redhat.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: target-devel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [PATCH 03/20] target: Make all control CDBs scatter-gather
Date: Fri, 08 Jul 2011 17:35:24 -0700 [thread overview]
Message-ID: <4E17A24C.9050004@redhat.com> (raw)
In-Reply-To: <20110708195755.GA12288@infradead.org>
On 07/08/2011 12:57 PM, Christoph Hellwig wrote:
>> @@ -4892,7 +4854,7 @@ int transport_generic_new_cmd(struct se_cmd *cmd)
>> * cmd->t_mem_list of struct se_mem->se_page
>> */
>> if (!(cmd->se_cmd_flags & SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC)) {
>> - ret = transport_allocate_resources(cmd);
>> + ret = transport_generic_get_mem(cmd);
>> if (ret < 0)
>> return ret;
>> }
>
> Before transport_allocate_resources used to be a no-op for
> SCF_SCSI_NON_DATA_CDB cdbs, which got lots with your patch. Given that
> they should have a zero length your patch should be fine, but such
> subtilities would be nice to be documented in the changelog.
I'm just going to add a test to the conditional to only call get_mem if
cmd->data_length is nonzero, seems better.
-- Andy
next prev parent reply other threads:[~2011-07-09 0:35 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-07 22:33 [0/20] Patches from June 28 v2 Andy Grover
2011-07-07 22:33 ` [PATCH 01/20] target: Remove ifdeffed code in t_g_process_write Andy Grover
2011-07-07 22:33 ` [PATCH 02/20] target: Pass 2nd param of transport_split_cdb by value Andy Grover
2011-07-07 22:33 ` [PATCH 03/20] target: Make all control CDBs scatter-gather Andy Grover
2011-07-08 19:57 ` Christoph Hellwig
2011-07-09 0:02 ` Andy Grover
2011-07-09 0:35 ` Andy Grover [this message]
2011-07-07 22:33 ` [PATCH 04/20] target: Enforce 1 page max for control cdb buffer sizes Andy Grover
2011-07-08 19:58 ` Christoph Hellwig
2011-07-07 22:33 ` [PATCH 05/20] target: Remove direct ramdisk code Andy Grover
2011-07-08 19:59 ` Christoph Hellwig
2011-07-07 22:33 ` [PATCH 06/20] target: Eliminate usage of struct se_mem Andy Grover
2011-07-08 20:13 ` Christoph Hellwig
2011-07-09 0:38 ` Andy Grover
2011-07-07 22:33 ` [PATCH 07/20] target: Rename task_sg_num to task_sg_nents Andy Grover
2011-07-07 22:33 ` [PATCH 08/20] target: Remove custom debug macros for pr_debug. Use pr_err() Andy Grover
2011-07-07 22:33 ` [PATCH 09/20] target: Remove custom debug macros in non-iscsi fabrics Andy Grover
2011-07-07 22:33 ` [PATCH 10/20] target/iscsi: Remove iscsi_target_debug.h and usage of TRACE() & printk() Andy Grover
2011-07-07 22:33 ` [PATCH 11/20] target/iscsi: Remove SE_CMD macro Andy Grover
2011-07-07 22:33 ` [PATCH 12/20] target: Set WSNZ=1 in block limits VPD. Abort if WRITE_SAME sectors = 0 Andy Grover
2011-07-07 22:33 ` [PATCH 13/20] target: Remove transport do_se_mem_map callback Andy Grover
2011-07-07 22:33 ` [PATCH 14/20] target: When using kunmap_first_data_page, use goto-style err handling Andy Grover
2011-07-07 22:33 ` [PATCH 15/20] target: Further simplify transport_free_pages Andy Grover
2011-07-07 22:33 ` [PATCH 16/20] target: Redo task allocation return value handling Andy Grover
2011-07-07 22:33 ` [PATCH 17/20] target/core: Remove extra parentheses Andy Grover
2011-07-07 22:33 ` [PATCH 18/20] target: Extraneous paren removal in tcm_vhost and tcm_qla2xxx Andy Grover
2011-07-07 22:33 ` [PATCH 19/20] target/iscsi: Remove unneeded parens in conditional statements Andy Grover
2011-07-07 22:33 ` [PATCH 20/20] target/iscsi: Simplify two small bits Andy Grover
2011-07-09 1:18 ` [0/20] target: Patches for June 28 v3 Andy Grover
2011-07-17 19:32 ` Nicholas A. Bellinger
2011-07-09 1:18 ` [PATCH 01/20] target: Remove ifdeffed code in t_g_process_write Andy Grover
2011-07-09 1:18 ` [PATCH 02/20] target: Pass 2nd param of transport_split_cdb by value Andy Grover
2011-07-09 1:18 ` [PATCH 03/20] target: Make all control CDBs scatter-gather Andy Grover
2011-07-17 19:40 ` Nicholas A. Bellinger
2011-07-09 1:18 ` [PATCH 04/20] target: Enforce 1 page max for control cdb buffer sizes Andy Grover
2011-07-09 1:18 ` [PATCH 05/20] target: Remove direct ramdisk code Andy Grover
2011-07-09 1:18 ` [PATCH 06/20] target: Eliminate usage of struct se_mem Andy Grover
2011-07-17 19:57 ` Nicholas A. Bellinger
2011-07-18 17:16 ` Andy Grover
2011-07-18 18:44 ` Nicholas A. Bellinger
2011-07-19 4:56 ` Christoph Hellwig
2011-07-19 5:40 ` Nicholas A. Bellinger
2011-07-09 1:18 ` [PATCH 07/20] target: Rename task_sg_num to task_sg_nents Andy Grover
2011-07-09 1:18 ` [PATCH 08/20] target: Remove custom debug macros for pr_debug. Use pr_err() Andy Grover
2011-07-09 1:18 ` [PATCH 09/20] target: Remove custom debug macros in non-iscsi fabrics Andy Grover
2011-07-17 20:02 ` Nicholas A. Bellinger
2011-07-09 1:18 ` [PATCH 10/20] target/iscsi: Remove iscsi_target_debug.h and usage of TRACE() & printk() Andy Grover
2011-07-09 1:18 ` [PATCH 11/20] target/iscsi: Remove SE_CMD macro Andy Grover
2011-07-09 1:18 ` [PATCH 12/20] target: Set WSNZ=1 in block limits VPD. Abort if WRITE_SAME sectors = 0 Andy Grover
2011-07-09 1:18 ` [PATCH 13/20] target: Remove transport do_se_mem_map callback Andy Grover
2011-07-09 1:18 ` [PATCH 14/20] target: Further simplify transport_free_pages Andy Grover
2011-07-09 1:18 ` [PATCH 15/20] target: Redo task allocation return value handling Andy Grover
2011-07-09 1:18 ` [PATCH 16/20] target/core: Remove extra parentheses Andy Grover
2011-07-09 1:18 ` [PATCH 17/20] target: Extraneous paren removal in tcm_vhost and tcm_qla2xxx Andy Grover
2011-07-09 1:18 ` [PATCH 18/20] target/iscsi: Remove unneeded parens in conditional statements Andy Grover
2011-07-09 1:18 ` [PATCH 19/20] target/iscsi: Simplify two small bits Andy Grover
2011-07-09 1:18 ` [PATCH 20/20] target: change alloc_task call to take *cdb, not *cmd Andy Grover
2011-07-09 10:11 ` Christoph Hellwig
2011-07-10 22:41 ` Andy Grover
2011-07-11 15:28 ` Christoph Hellwig
2011-07-17 20:04 ` Nicholas A. Bellinger
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