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Groups > linux.kernel > #1238786 > unrolled thread
| Started by | Sudip Mukherjee <sudipm.mukherjee@gmail.com> |
|---|---|
| First post | 2015-10-03 11:30 +0200 |
| Last post | 2015-10-07 00:40 +0200 |
| Articles | 4 — 2 participants |
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[PATCH v2 1/3] Input: db9 - store object at correct index Sudip Mukherjee <sudipm.mukherjee@gmail.com> - 2015-10-03 11:30 +0200
Re: [PATCH v2 1/3] Input: db9 - store object at correct index Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2015-10-06 02:40 +0200
Re: [PATCH v2 1/3] Input: db9 - store object at correct index Sudip Mukherjee <sudipm.mukherjee@gmail.com> - 2015-10-06 07:40 +0200
Re: [PATCH v2 1/3] Input: db9 - store object at correct index Dmitry Torokhov <dmitry.torokhov@gmail.com> - 2015-10-07 00:40 +0200
| From | Sudip Mukherjee <sudipm.mukherjee@gmail.com> |
|---|---|
| Date | 2015-10-03 11:30 +0200 |
| Subject | [PATCH v2 1/3] Input: db9 - store object at correct index |
| Message-ID | <qfriF-684-3@gated-at.bofh.it> |
The variable i is used to check the port to attach to and we are
supposed to save the reference of struct db9 in the location given by
db9_base[i]. But after finding out the index, i is getting modified again
so we saved in a wrong index.
While at it mark db9_base[i] as NULL after it is freed.
Fixes: 2260c419b52b ("Input: db9 - use parallel port device model")
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
---
drivers/input/joystick/db9.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/drivers/input/joystick/db9.c b/drivers/input/joystick/db9.c
index cf1f602..932d073 100644
--- a/drivers/input/joystick/db9.c
+++ b/drivers/input/joystick/db9.c
@@ -560,25 +560,25 @@ static void db9_attach(struct parport *pp)
const struct db9_mode_data *db9_mode;
struct pardevice *pd;
struct input_dev *input_dev;
- int i, j;
+ int i, j, port_idx;
int mode;
struct pardev_cb db9_parport_cb;
- for (i = 0; i < DB9_MAX_PORTS; i++) {
- if (db9_cfg[i].nargs == 0 ||
- db9_cfg[i].args[DB9_ARG_PARPORT] < 0)
+ for (port_idx = 0; port_idx < DB9_MAX_PORTS; port_idx++) {
+ if (db9_cfg[port_idx].nargs == 0 ||
+ db9_cfg[port_idx].args[DB9_ARG_PARPORT] < 0)
continue;
- if (db9_cfg[i].args[DB9_ARG_PARPORT] == pp->number)
+ if (db9_cfg[port_idx].args[DB9_ARG_PARPORT] == pp->number)
break;
}
- if (i == DB9_MAX_PORTS) {
+ if (port_idx == DB9_MAX_PORTS) {
pr_debug("Not using parport%d.\n", pp->number);
return;
}
- mode = db9_cfg[i].args[DB9_ARG_MODE];
+ mode = db9_cfg[port_idx].args[DB9_ARG_MODE];
if (mode < 1 || mode >= DB9_MAX_PAD || !db9_modes[mode].n_buttons) {
printk(KERN_ERR "db9.c: Bad device type %d\n", mode);
@@ -594,7 +594,7 @@ static void db9_attach(struct parport *pp)
db9_parport_cb.flags = PARPORT_FLAG_EXCL;
- pd = parport_register_dev_model(pp, "db9", &db9_parport_cb, i);
+ pd = parport_register_dev_model(pp, "db9", &db9_parport_cb, port_idx);
if (!pd) {
printk(KERN_ERR "db9.c: parport busy already - lp.o loaded?\n");
return;
@@ -649,7 +649,7 @@ static void db9_attach(struct parport *pp)
goto err_free_dev;
}
- db9_base[i] = db9;
+ db9_base[port_idx] = db9;
return;
err_free_dev:
@@ -676,6 +676,7 @@ static void db9_detach(struct parport *port)
return;
db9 = db9_base[i];
+ db9_base[i] = NULL;
for (i = 0; i < min(db9_modes[db9->mode].n_pads, DB9_MAX_DEVICES); i++)
input_unregister_device(db9->dev[i]);
--
1.9.1
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| From | Dmitry Torokhov <dmitry.torokhov@gmail.com> |
|---|---|
| Date | 2015-10-06 02:40 +0200 |
| Message-ID | <qgosp-6Pu-1@gated-at.bofh.it> |
| In reply to | #1238786 |
On Sat, Oct 03, 2015 at 02:54:56PM +0530, Sudip Mukherjee wrote:
> The variable i is used to check the port to attach to and we are
> supposed to save the reference of struct db9 in the location given by
> db9_base[i]. But after finding out the index, i is getting modified again
> so we saved in a wrong index.
> While at it mark db9_base[i] as NULL after it is freed.
>
> Fixes: 2260c419b52b ("Input: db9 - use parallel port device model")
> Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Applied the lot, thank you.
> ---
> drivers/input/joystick/db9.c | 19 ++++++++++---------
> 1 file changed, 10 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/input/joystick/db9.c b/drivers/input/joystick/db9.c
> index cf1f602..932d073 100644
> --- a/drivers/input/joystick/db9.c
> +++ b/drivers/input/joystick/db9.c
> @@ -560,25 +560,25 @@ static void db9_attach(struct parport *pp)
> const struct db9_mode_data *db9_mode;
> struct pardevice *pd;
> struct input_dev *input_dev;
> - int i, j;
> + int i, j, port_idx;
> int mode;
> struct pardev_cb db9_parport_cb;
>
> - for (i = 0; i < DB9_MAX_PORTS; i++) {
> - if (db9_cfg[i].nargs == 0 ||
> - db9_cfg[i].args[DB9_ARG_PARPORT] < 0)
> + for (port_idx = 0; port_idx < DB9_MAX_PORTS; port_idx++) {
> + if (db9_cfg[port_idx].nargs == 0 ||
> + db9_cfg[port_idx].args[DB9_ARG_PARPORT] < 0)
> continue;
>
> - if (db9_cfg[i].args[DB9_ARG_PARPORT] == pp->number)
> + if (db9_cfg[port_idx].args[DB9_ARG_PARPORT] == pp->number)
> break;
> }
>
> - if (i == DB9_MAX_PORTS) {
> + if (port_idx == DB9_MAX_PORTS) {
> pr_debug("Not using parport%d.\n", pp->number);
> return;
> }
>
> - mode = db9_cfg[i].args[DB9_ARG_MODE];
> + mode = db9_cfg[port_idx].args[DB9_ARG_MODE];
>
> if (mode < 1 || mode >= DB9_MAX_PAD || !db9_modes[mode].n_buttons) {
> printk(KERN_ERR "db9.c: Bad device type %d\n", mode);
> @@ -594,7 +594,7 @@ static void db9_attach(struct parport *pp)
>
> db9_parport_cb.flags = PARPORT_FLAG_EXCL;
>
> - pd = parport_register_dev_model(pp, "db9", &db9_parport_cb, i);
> + pd = parport_register_dev_model(pp, "db9", &db9_parport_cb, port_idx);
> if (!pd) {
> printk(KERN_ERR "db9.c: parport busy already - lp.o loaded?\n");
> return;
> @@ -649,7 +649,7 @@ static void db9_attach(struct parport *pp)
> goto err_free_dev;
> }
>
> - db9_base[i] = db9;
> + db9_base[port_idx] = db9;
> return;
>
> err_free_dev:
> @@ -676,6 +676,7 @@ static void db9_detach(struct parport *port)
> return;
>
> db9 = db9_base[i];
> + db9_base[i] = NULL;
>
> for (i = 0; i < min(db9_modes[db9->mode].n_pads, DB9_MAX_DEVICES); i++)
> input_unregister_device(db9->dev[i]);
> --
> 1.9.1
>
--
Dmitry
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| From | Sudip Mukherjee <sudipm.mukherjee@gmail.com> |
|---|---|
| Date | 2015-10-06 07:40 +0200 |
| Message-ID | <qgt8K-5bf-9@gated-at.bofh.it> |
| In reply to | #1240047 |
On Mon, Oct 05, 2015 at 05:32:05PM -0700, Dmitry Torokhov wrote:
> On Sat, Oct 03, 2015 at 02:54:56PM +0530, Sudip Mukherjee wrote:
> > The variable i is used to check the port to attach to and we are
> > supposed to save the reference of struct db9 in the location given by
> > db9_base[i]. But after finding out the index, i is getting modified again
> > so we saved in a wrong index.
> > While at it mark db9_base[i] as NULL after it is freed.
> >
> > Fixes: 2260c419b52b ("Input: db9 - use parallel port device model")
> > Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
>
> Applied the lot, thank you.
Thanks. And the change for serio/parkbd was pending. You said it was
clashing with other changs. Do i need to rebase and send you?
regards
sudip
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| From | Dmitry Torokhov <dmitry.torokhov@gmail.com> |
|---|---|
| Date | 2015-10-07 00:40 +0200 |
| Message-ID | <qgJ3Q-2UE-3@gated-at.bofh.it> |
| In reply to | #1240156 |
On Tue, Oct 06, 2015 at 11:08:59AM +0530, Sudip Mukherjee wrote:
> On Mon, Oct 05, 2015 at 05:32:05PM -0700, Dmitry Torokhov wrote:
> > On Sat, Oct 03, 2015 at 02:54:56PM +0530, Sudip Mukherjee wrote:
> > > The variable i is used to check the port to attach to and we are
> > > supposed to save the reference of struct db9 in the location given by
> > > db9_base[i]. But after finding out the index, i is getting modified again
> > > so we saved in a wrong index.
> > > While at it mark db9_base[i] as NULL after it is freed.
> > >
> > > Fixes: 2260c419b52b ("Input: db9 - use parallel port device model")
> > > Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
> >
> > Applied the lot, thank you.
>
> Thanks. And the change for serio/parkbd was pending. You said it was
> clashing with other changs. Do i need to rebase and send you?
No, I applied it now.
Thanks.
--
Dmitry
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