lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 29 May 2018 11:30:38 +1000 From: Benjamin Herrenschmidt <benh@...nel.crashing.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jeremy Kerr <jk@...abs.org>, Joel Stanley <joel@....id.au>, Christopher Bostic <cbostic@...ux.vnet.ibm.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org> Subject: [PATCH 09/15] fsi/gpio: Include command build in locked section From: Jeremy Kerr <jk@...abs.org> For implementing relative addressing mode, we'll need to build a command that is coherent with CFAM state. To do that, include the build_command_* functions in the locked section of read/write/term. Signed-off-by: Jeremy Kerr <jk@...abs.org> Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org> --- drivers/fsi/fsi-master-gpio.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) diff --git a/drivers/fsi/fsi-master-gpio.c b/drivers/fsi/fsi-master-gpio.c index e1bde9e3f855..d50ea4849377 100644 --- a/drivers/fsi/fsi-master-gpio.c +++ b/drivers/fsi/fsi-master-gpio.c @@ -463,14 +463,10 @@ static int fsi_master_gpio_xfer(struct fsi_master_gpio *master, uint8_t slave, { int rc; - mutex_lock(&master->cmd_lock); - rc = send_request(master, cmd); if (!rc) rc = poll_for_response(master, slave, resp_len, resp); - mutex_unlock(&master->cmd_lock); - return rc; } @@ -479,12 +475,17 @@ static int fsi_master_gpio_read(struct fsi_master *_master, int link, { struct fsi_master_gpio *master = to_fsi_master_gpio(_master); struct fsi_gpio_msg cmd; + int rc; if (link != 0) return -ENODEV; + mutex_lock(&master->cmd_lock); build_abs_ar_command(&cmd, id, addr, size, NULL); - return fsi_master_gpio_xfer(master, id, &cmd, size, val); + rc = fsi_master_gpio_xfer(master, id, &cmd, size, val); + mutex_unlock(&master->cmd_lock); + + return rc; } static int fsi_master_gpio_write(struct fsi_master *_master, int link, @@ -492,12 +493,17 @@ static int fsi_master_gpio_write(struct fsi_master *_master, int link, { struct fsi_master_gpio *master = to_fsi_master_gpio(_master); struct fsi_gpio_msg cmd; + int rc; if (link != 0) return -ENODEV; + mutex_lock(&master->cmd_lock); build_abs_ar_command(&cmd, id, addr, size, val); - return fsi_master_gpio_xfer(master, id, &cmd, 0, NULL); + rc = fsi_master_gpio_xfer(master, id, &cmd, 0, NULL); + mutex_unlock(&master->cmd_lock); + + return rc; } static int fsi_master_gpio_term(struct fsi_master *_master, @@ -505,12 +511,17 @@ static int fsi_master_gpio_term(struct fsi_master *_master, { struct fsi_master_gpio *master = to_fsi_master_gpio(_master); struct fsi_gpio_msg cmd; + int rc; if (link != 0) return -ENODEV; + mutex_lock(&master->cmd_lock); build_term_command(&cmd, id); - return fsi_master_gpio_xfer(master, id, &cmd, 0, NULL); + rc = fsi_master_gpio_xfer(master, id, &cmd, 0, NULL); + mutex_unlock(&master->cmd_lock); + + return rc; } static int fsi_master_gpio_break(struct fsi_master *_master, int link) -- 2.17.0
Powered by blists - more mailing lists