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[v3,00/10] trivial patchs for static code analyzer fixes

Message ID 20200827110311.164316-1-kuhn.chenqun@huawei.com
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Series trivial patchs for static code analyzer fixes | expand

Message

Chenqun (kuhn) Aug. 27, 2020, 11:03 a.m. UTC
Since v2:
- Patch1: Addressed Li Qiang review comment.
- Patch2: Addressed Peter Maydell and Li Qiang review comment.
- Patch3:Delete memleak commit message, and Addressed Peter Maydell
  review comment.
- Patch4: Addressed Peter Maydell review comment.
- Patch6: Addressed Li Qiang review comment.
- Patch7: Addressed Stefan Hajnoczi and Li Qiang review comment.
- Patch8: Addressed Markus Armbruster review comment.
- Patch9: Change default return value in exynos4210_combiner_read().

Chen Qun (10):
  hw/arm/virt-acpi-build:Remove dead assignment in build_madt()
  hw/arm/omap1:Remove redundant statement in omap_clkdsp_read()
  target/arm/translate-a64:Remove dead assignment in
    handle_scalar_simd_shli()
  target/arm/translate-a64:Remove redundant statement in
    disas_simd_two_reg_misc_fp16()
  hw/virtio/vhost-user:Remove dead assignment in scrub_shadow_regions()
  hw/net/virtio-net:Remove redundant statement in
    virtio_net_rsc_tcp_ctrl_check()
  vfio/platform: Remove dead assignment in vfio_intp_interrupt()
  usb/bus: Remove dead assignment in usb_get_fw_dev_path()
  hw/intc: fix default registers value in exynos4210_combiner_read()
  hw/display/vga:Remove redundant statement in vga_draw_graphic()

 hw/arm/omap1.c                | 1 -
 hw/arm/virt-acpi-build.c      | 3 +--
 hw/display/vga.c              | 1 -
 hw/intc/exynos4210_combiner.c | 1 -
 hw/net/virtio-net.c           | 1 -
 hw/usb/bus.c                  | 4 ++--
 hw/vfio/platform.c            | 2 +-
 hw/virtio/vhost-user.c        | 2 +-
 target/arm/translate-a64.c    | 7 ++-----
 9 files changed, 7 insertions(+), 15 deletions(-)

Comments

Laurent Vivier Sept. 1, 2020, 9:53 a.m. UTC | #1
Le 27/08/2020 à 13:03, Chen Qun a écrit :
> Clang static code analyzer show warning:
> hw/arm/virt-acpi-build.c:641:5: warning: Value stored to 'madt' is never read
>     madt = acpi_data_push(table_data, sizeof *madt);
>     ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
> Reviewed-by: Li Qiang <liq3ea@gmail.com>
> ---
> Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Cc: "Michael S. Tsirkin" <mst@redhat.com>
> Cc: Igor Mammedov <imammedo@redhat.com>
> Cc: qemu-arm@nongnu.org
> ---
>  hw/arm/virt-acpi-build.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index 91f0df7b13..f830f9b779 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -633,12 +633,11 @@ build_madt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
>      int madt_start = table_data->len;
>      const MemMapEntry *memmap = vms->memmap;
>      const int *irqmap = vms->irqmap;
> -    AcpiMultipleApicTable *madt;
>      AcpiMadtGenericDistributor *gicd;
>      AcpiMadtGenericMsiFrame *gic_msi;
>      int i;
>  
> -    madt = acpi_data_push(table_data, sizeof *madt);
> +    acpi_data_push(table_data, sizeof(AcpiMultipleApicTable));
>  
>      gicd = acpi_data_push(table_data, sizeof *gicd);
>      gicd->type = ACPI_APIC_GENERIC_DISTRIBUTOR;
> 

Applied to my trivial-patches branch.

Thanks,
Laurent
Laurent Vivier Sept. 1, 2020, 9:56 a.m. UTC | #2
Le 27/08/2020 à 13:03, Chen Qun a écrit :
> Clang static code analyzer show warning:
> target/arm/translate-a64.c:8635:14: warning: Value stored to 'tcg_rn' during its
>  initialization is never read
>     TCGv_i64 tcg_rn = new_tmp_a64(s);
>              ^~~~~~   ~~~~~~~~~~~~~~
> target/arm/translate-a64.c:8636:14: warning: Value stored to 'tcg_rd' during its
>  initialization is never read
>     TCGv_i64 tcg_rd = new_tmp_a64(s);
>              ^~~~~~   ~~~~~~~~~~~~~~
> 
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
> Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
> ---
> Cc: Peter Maydell <peter.maydell@linaro.org>
> Cc: qemu-arm@nongnu.org
> 
> v2->v3:According to Peter's review, the variable 's' does not have a memleak,
> so deleted the description about memleak.
> ---
>  target/arm/translate-a64.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
> index 534c3ff5f3..c83bb85e4e 100644
> --- a/target/arm/translate-a64.c
> +++ b/target/arm/translate-a64.c
> @@ -8632,8 +8632,8 @@ static void handle_scalar_simd_shli(DisasContext *s, bool insert,
>      int size = 32 - clz32(immh) - 1;
>      int immhb = immh << 3 | immb;
>      int shift = immhb - (8 << size);
> -    TCGv_i64 tcg_rn = new_tmp_a64(s);
> -    TCGv_i64 tcg_rd = new_tmp_a64(s);
> +    TCGv_i64 tcg_rn;
> +    TCGv_i64 tcg_rd;
>  
>      if (!extract32(immh, 3, 1)) {
>          unallocated_encoding(s);
> 

Applied to my trivial-patches branch.

Thanks,
Laurent
Laurent Vivier Sept. 1, 2020, 10:04 a.m. UTC | #3
Le 27/08/2020 à 13:03, Chen Qun a écrit :
> Clang static code analyzer show warning:
> qemu/hw/usb/bus.c:615:13: warning: Value stored to 'pos' is never read
>             pos += snprintf(fw_path + pos, fw_len - pos, "%s@%lx",
> 
> Reported-by: Euler Robot <euler.robot@huawei.com>
> Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
> Reviewed-by: Markus Armbruster <armbru@redhat.com>
> ---
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Cc: Markus Armbruster <armbru@redhat.com>
> 
> v2->v3: The format of the snprintf statement is modified(Base on Markus review).
> ---
>  hw/usb/bus.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/usb/bus.c b/hw/usb/bus.c
> index b17bda3b29..2b11041451 100644
> --- a/hw/usb/bus.c
> +++ b/hw/usb/bus.c
> @@ -612,8 +612,8 @@ static char *usb_get_fw_dev_path(DeviceState *qdev)
>              in++;
>          } else {
>              /* the device itself */
> -            pos += snprintf(fw_path + pos, fw_len - pos, "%s@%lx",
> -                            qdev_fw_name(qdev), nr);
> +            snprintf(fw_path + pos, fw_len - pos, "%s@%lx",
> +                     qdev_fw_name(qdev), nr);
>              break;
>          }
>      }
> 

Applied to my trivial-patches branch.

Thanks,
Laurent