Thread (96 messages) 96 messages, 16 authors, 2025-10-09
STALE248d
Revisions (3)
  1. rfc current
  2. v1 [diff vs current]
  3. v2 [diff vs current]

[PATCH RFC 27/35] memstick: drop nth_page() usage within SG entry

From: David Hildenbrand <hidden>
Date: 2025-08-21 20:08:28
Also in: dri-devel, intel-gfx, io-uring, kvm, linux-crypto, linux-ide, linux-iommu, linux-kselftest, linux-mips, linux-mm, linux-mmc, linux-riscv, linux-s390, linux-scsi, lkml, virtualization
Subsystem: sony memorystick subsystem, the rest, ti flash media memorystick/mmc drivers · Maintainers: Maxim Levitsky, Alex Dubov, Ulf Hansson, Linus Torvalds

It's no longer required to use nth_page() when iterating pages within a
single SG entry, so let's drop the nth_page() usage.

Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: Ulf Hansson <redacted>
Signed-off-by: David Hildenbrand <redacted>
---
 drivers/memstick/host/jmb38x_ms.c | 3 +--
 drivers/memstick/host/tifm_ms.c   | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c
index cddddb3a5a27f..c5e71d39ffd51 100644
--- a/drivers/memstick/host/jmb38x_ms.c
+++ b/drivers/memstick/host/jmb38x_ms.c
@@ -317,8 +317,7 @@ static int jmb38x_ms_transfer_data(struct jmb38x_ms_host *host)
 		unsigned int p_off;
 
 		if (host->req->long_data) {
-			pg = nth_page(sg_page(&host->req->sg),
-				      off >> PAGE_SHIFT);
+			pg = sg_page(&host->req->sg) + off / PAGE_SIZE;
 			p_off = offset_in_page(off);
 			p_cnt = PAGE_SIZE - p_off;
 			p_cnt = min(p_cnt, length);
diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c
index db7f3a088fb09..0d64184ca10a9 100644
--- a/drivers/memstick/host/tifm_ms.c
+++ b/drivers/memstick/host/tifm_ms.c
@@ -201,8 +201,7 @@ static unsigned int tifm_ms_transfer_data(struct tifm_ms *host)
 		unsigned int p_off;
 
 		if (host->req->long_data) {
-			pg = nth_page(sg_page(&host->req->sg),
-				      off >> PAGE_SHIFT);
+			pg = sg_page(&host->req->sg) + off / PAGE_SIZE;
 			p_off = offset_in_page(off);
 			p_cnt = PAGE_SIZE - p_off;
 			p_cnt = min(p_cnt, length);
-- 
2.50.1
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