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Wed, 26 Jun 2024 03:14:41 -0700 (PDT) Received: from localhost.localdomain.oslab.amer.dell.com ([139.167.223.130]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1fa360317ccsm57063865ad.279.2024.06.26.03.14.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Jun 2024 03:14:40 -0700 (PDT) From: Prabhakar Pujeri To: linux-scsi@vger.kernel.org Cc: Prabhakar Pujeri Subject: [PATCH 14/14] scsi: st: Used max() for buffer size in setup_buffering and Simplified transfer calculations in st_read, append_to_buffer, and from_buffer Date: Wed, 26 Jun 2024 06:13:42 -0400 Message-ID: <20240626101342.1440049-15-prabhakar.pujeri@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240626101342.1440049-1-prabhakar.pujeri@gmail.com> References: <20240626101342.1440049-1-prabhakar.pujeri@gmail.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Signed-off-by: Prabhakar Pujeri --- drivers/scsi/st.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c index 0d8ce1a92168..b473f79c5a73 100644 --- a/drivers/scsi/st.c +++ b/drivers/scsi/st.c @@ -1575,8 +1575,7 @@ static int setup_buffering(struct scsi_tape *STp, const char __user *buf, if (!STbp->do_dio) { if (STp->block_size) - bufsize = STp->block_size > st_fixed_buffer_size ? - STp->block_size : st_fixed_buffer_size; + bufsize = max(STp->block_size, st_fixed_buffer_size); else { bufsize = count; /* Make sure that data from previous user is not leaked even if @@ -2187,8 +2186,7 @@ st_read(struct file *filp, char __user *buf, size_t count, loff_t * ppos) STps->eof, STbp->buffer_bytes, (int)(count - total)); ) /* end DEB */ - transfer = STbp->buffer_bytes < count - total ? - STbp->buffer_bytes : count - total; + transfer = min(STbp->buffer_bytes, count - total); if (!do_dio) { i = from_buffer(STbp, buf, transfer); if (i) { @@ -3997,7 +3995,7 @@ static int append_to_buffer(const char __user *ubp, struct st_buffer * st_bp, in } for (; i < st_bp->frp_segs && do_count > 0; i++) { struct page *page = st_bp->reserved_pages[i]; - cnt = length - offset < do_count ? length - offset : do_count; + cnt = min(length - offset, do_count); res = copy_from_user(page_address(page) + offset, ubp, cnt); if (res) return (-EFAULT); @@ -4029,7 +4027,7 @@ static int from_buffer(struct st_buffer * st_bp, char __user *ubp, int do_count) } for (; i < st_bp->frp_segs && do_count > 0; i++) { struct page *page = st_bp->reserved_pages[i]; - cnt = length - offset < do_count ? length - offset : do_count; + cnt = min(length - offset, do_count); res = copy_to_user(ubp, page_address(page) + offset, cnt); if (res) return (-EFAULT);