On Tue, Feb 04, 2025 at 11:31:35AM +0100, Alexandra Winter wrote: > From: Aswin Karuvally <aswin@xxxxxxxxxxxxx> > > The original Open Systems Adapter (OSA) was introduced by IBM in the > mid-90s. These were then superseded by OSA-Express in 1999 which used > Queued Direct IO to greatly improve throughput. The newer cards > retained the older, slower non-QDIO (OSE) modes for compatibility with > older systems. In Linux, the lcs driver was responsible for cards > operating in the older OSE mode and the qeth driver was introduced to > allow the OSA-Express cards to operate in the newer QDIO (OSD) mode. > > For an S390 machine from 1998 or later, there is no reason to use the > OSE mode and lcs driver as all OSA cards since 1999 provide the faster > OSD mode. As a result, it's been years since we have heard of a > customer configuration involving the lcs driver. > > This patch removes the lcs driver. The technology it supports has been > obsolete for past 25+ years and is irrelevant for current use cases. > > Reviewed-by: Alexandra Winter <wintera@xxxxxxxxxxxxx> > Acked-by: Heiko Carstens <hca@xxxxxxxxxxxxx> > Acked-by: Peter Oberparleiter <oberpar@xxxxxxxxxxxxx> > Signed-off-by: Aswin Karuvally <aswin@xxxxxxxxxxxxx> > Signed-off-by: Alexandra Winter <wintera@xxxxxxxxxxxxx> > --- > Documentation/arch/s390/driver-model.rst | 2 +- > arch/s390/include/asm/irq.h | 1 - > arch/s390/kernel/irq.c | 1 - > drivers/s390/net/Kconfig | 11 +- > drivers/s390/net/Makefile | 1 - > drivers/s390/net/lcs.c | 2385 ---------------------- > drivers/s390/net/lcs.h | 342 ---- > 7 files changed, 2 insertions(+), 2741 deletions(-) > delete mode 100644 drivers/s390/net/lcs.c > delete mode 100644 drivers/s390/net/lcs.h Less is more :) Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
